Hold the Boat to the Seabed

The sails are down, but the wind still pushes on the boat. Water moving past the immersed hull can add another force. To remain near one place without sailing or motoring against those forces, the yacht needs a connection to something that can supply a resisting reaction.

An anchor grips or bears on the seabed. A tension connection runs from it to the boat, where suitable attachments pass the pull into the hull. Together with the fittings that connect, guide, haul, secure and store them, the anchor and its rope or chain form the ground tackle. The complete system must work in several states: holding the boat, bringing equipment back aboard and carrying that equipment while sailing.

Start at the bottom. The anchor’s weight helps bring it there, but weight alone does not explain its hold. Its shape has to meet the ground in a useful attitude and obtain a reaction from that contact.

Give the bottom something to resist

Imagine a traditional iron anchor with a long central member and two curved arms at one end. The long member is the anchor shank. Its opposite end receives the cable pull. In the selected traditional arrangement, a separate anchor ring passes through an eye at that end: the cable or its connector bears on the ring, which passes the pull into the shank.

Each arm projects from the other end of the shank towards a bottom-engaging extremity. The crown is the central joining region where those arms meet the shank. A load entering one arm therefore reaches the crown and then the lengthwise member. The crown is not the attachment ring, despite both being near an end of the assembly.

The part intended to enter or grip the ground is the fluke. On this traditional form its pointed tip is the bill, or bill point. A suitably presented point can begin penetrating the bottom as the shank is pulled. Behind it, the palm is the broad face of the fluke. As engagement develops, ground bears over that wider face, and the reaction passes through the arm and crown towards the shank. Point, bearing face and supporting arm contribute different parts of the same mechanism.

This still leaves an orientation problem. Laid flat with both arms spread across the bed, the anchor might slide without either bill entering effectively. A stock crosses the shank near the ring end, at right angles to the plane containing the arms. In the traditional example it spans farther than the arms. Its contact with the bottom helps turn the anchor so that one fluke points down. Pull through the shank can then bring that fluke into engagement. The stock presents the holding part; it does not replace the palm’s ground contact.

An anchor using such a transverse member is a stock anchor. The familiar opposed-arm arrangement is the Fisherman, or Admiralty-pattern anchor, within a family whose proportions and construction vary. South Street Seaport Museum uses those names for the traditional shank, two arms and crosswise stock. Royal Museums Greenwich’s example, catalogued around 1750, combines a wrought-iron body with a wooden stock; the oak stock now fitted is a modern replacement. Its identifiable geometry supplies a better starting point than treating every anchor silhouette as the same device. Seaport Museum’s naming account; Greenwich’s Admiralty-pattern anchor.

The pattern also continues in altered manufacture and storage arrangements. P. E. Luke makes a fisherman-derived anchor from galvanised ductile iron in three separable pieces. That is a particular continuing version, not evidence that every old stock anchor could be dismantled in the same way. The fluke still needs useful contact with the bed, while the joints answer an additional problem aboard. Luke’s documented construction.

Change the part that turns into the ground

A projecting stock creates handling difficulties as well as useful bottom contact. A stockless anchor omits that separate transverse member. In the conventional shipboard example illustrated by the US Navy, the arm-and-fluke head pivots relative to the shank. Projections at the back of the head, called tripping palms in that description, meet the bottom as the cable pulls. Their reaction turns the flukes into a digging attitude. The orienting contact has moved into the head assembly.

Its joint matters in two states. At the bottom, it permits the head to turn relative to the pulled shank. During recovery, the absence of the long stock and the movement of the head permit a different fit against the bow. We will return to that support after following the cable aboard. Stockless describes the missing cross-member, not a guarantee of better holding in every bed. US Navy, Seaman, January 1993, pages 4-1–4-3.

A fluke anchor, when used as a type name, commonly means the pivoting, broad, flat-fluke family. Many other anchors possess flukes, so the name of the part and the name of this family need to remain distinct. Fortress supplies a specific example: two broad flukes fit into a crown assembly that can turn relative to the shank. A transverse stock passes through the crown and shank near this end. This flat-fluke anchor therefore has a stock; it is not made stockless by belonging to a different family from the traditional two-arm example.

As the shank pulls along a penetrable bed, contact at the crown can turn the broad flukes down. Fortress’s optional mud palms are small plates attached to the sides of the crown. Their contact helps raise that region and present the fluke points for entry. They are orienting additions, distinct from the broad palm face already located on the traditional fluke. The maker provides alternative fluke-angle positions, specifying the greater angle for very soft mud. Changing an angle changes how the surfaces enter and meet the ground; it is not an improvement independent of the material they meet. Fortress’s actual assembly and angle positions.

A plough anchor has a holding body resembling the pointed, sloping surfaces of a plough. G. I. Taylor approached that shape through a weight problem: he wanted substantial hold from an anchor light enough for a seaplane to carry. Adding metal would defeat part of the purpose. His small-model trials instead explored the hinge position, angles and way the body entered the ground.

In Taylor’s preferred patented arrangement, two sloping blades meet along a ridge towards a point. The cable-carrying shank connects to this body through an oblique hinge. With the anchor initially lying on its side, the point and rear part of the blade, together with the hinge region, establish its contact attitude. Pulling the shank can bring the point into the bed; continued ground reaction then turns the body towards its working, buried position. The hinge’s location and angle are part of that response. It is not merely a loose joint added to an otherwise fixed plough.

The larger trials exposed a second requirement. At Felixstowe, the anchor developed more pull than Taylor had anticipated and came back with its shank bent. He reinforced that member and tested again. Successful burial had made the structural weakness visible: the cable’s pull still had to reach the holding body through sound metal. Taylor’s 1934 account then considered the design’s attraction for short-handed yachts, with his own proposed yacht trial still ahead. The development joined a carrying constraint, experiments in shape and a revision to the loaded structure.

Taylor’s British filing dates from 1933 and the US patent was granted in 1934. The later marketed CQR retains a hinged plough arrangement, while fixed-shank plough forms make a different connection between body and cable. We will meet a specifically documented Delta support aboard a yacht later in the chapter. Neither the family name nor a similarity of outline establishes identical articulation. Taylor’s 1934 experiments; his patented geometry.

A claw anchor uses a curved holding body. Peter Bruce’s patent, granted in 1973 from work filed in Britain in 1970, illustrates a useful particular form. Its fixed bent shank leads to a central fluke between two upcurved side portions. If an initially overturned or sideways anchor catches the bed at one of those curved sides, continued pull moves the contact reaction along the curved surface. That reaction can roll the central fluke into entry. The surrounding ground then bears on the buried surfaces and the load reaches the fixed shank through the body.

Here the curved side’s contact supplies the turning action that the traditional stock, pivoting head or Taylor hinge helped obtain in other arrangements. The patent’s response depends on its geometry and the ground allowing the described movement. A later one-piece cast-steel claw sold by Lewmar supplies a continuing form, but neither its name nor Bruce’s patent promises an automatic reset in every bottom. Bruce, US3777695, figures 4–5 and their description; Lewmar’s plough and claw forms, pages 88–91.

A grapnel has several projecting arms or hooks around its body. A suitably presented arm can catch a bottom feature, passing the reaction into the body and its attached line. That concentrated catching contact differs from the broad buried surfaces of the flat-fluke example. Smyth’s 1867 description identifies four palmed claws on a boat grapnel and separately describes grappling another vessel. The latter use does not turn every grappling hook into a suitable anchor. Attwood’s small-boat folding grapnel retains four flukes, but lets them close alongside the body for storage and lock open for use. Its bottom contact and its folded shape answer separate requirements. Smyth, grapnel entries; Attwood’s documented folding form, page 107.

Hold in a particular bottom

The seabed material and condition are the holding ground. Sand that permits a point to enter and then bears on a buried surface supplies a different contact from very soft mud that yields around it. A hard obstruction can prevent the intended entry altogether, or catch one projecting part without establishing the expected buried support. The selected Fortress angle change and Taylor’s experiments make sense only with that ground attached to the explanation.

To set an anchor is to bring it into engagement; an anchor set also names the achieved condition. Initial movement can be part of the process: a point enters, the body turns, and more ground begins bearing against it. Once set, the bottom reaction can oppose the pull arriving from the boat within the conditions that engagement can sustain.

Anchor drag occurs when the anchor moves across the bottom instead of maintaining the required hold. A changed load, direction or patch of ground can alter the available reaction. This differs from the boat changing position around an anchor that remains in place. It also differs from deliberately changing the pull to release the anchor during recovery. The same anchor can pass through contact, setting, holding and movement without changing its name.

The sea anchor and drogue encountered during the manoeuvring lesson obtained their reaction from water moving relative to fabric or a drag body. Their bow or stern connections altered drift and heading, but those devices could move with the water. This anchor seeks a reaction from the seabed. Its connection can restrain the boat relative to the ground while the surrounding water continues to move.

Holding position does not establish clearance beneath the yacht. Shoal water is shallow enough to restrict the hull or its appendages. Grounding occurs when the boat meets the seabed or another submerged surface, through its hull, keel, rudder or another part. The earlier keel lesson showed why the resulting load depends on the contact’s position, direction and motion.

Taking the ground, or drying out, can instead be a planned rest on suitable supports as the water falls. A yacht’s capable twin keels can provide separated contacts, while an unsuitable keel, uneven ground or a moving impact gives a different situation. An anchor’s successful grip keeps its own position; it does not supply the hull support needed when buoyancy is lost.

Join the anchor to the boat

The tensile connection from anchor to vessel is its rode. We have already used that word for the working line of a water-drag device. Here the rode can be rope, chain or a connected combination. Anchor cable names the substantial rope or chain doing this anchoring job. Traditional cable does not necessarily mean an electrical conductor or even metal: the material and endpoints identify the intended sense. Cable-laid rope, encountered earlier, names a construction rather than the whole anchoring duty.

In an all-rope route, tension passes through the rope and its end connections. An all-chain route passes it through joined metal elements. A mixed route adds a rope-to-chain connection between them, allowing a metal length near the bed and a flexible rope length farther inboard to contribute their different properties. The splice or connector must carry the same continuing pull across that material boundary.

Each chain link is an individual closed element interlocked with its neighbours. One end bears against the next link; the metal around its opening carries the load towards the opposite contact. Adjacent links can change angle, giving the assembled chain flexibility without requiring each link to bend like rope. This is the linked-material chain already distinguished beneath traditional shrouds, now made and connected for another job. Its dimensions will also have to suit the machinery that moves it.

An anchor shackle is the removable closed connector at the anchor-to-rode joint. In Rocna’s specified direct chain attachment, the shackle’s curved body goes through the anchor shank’s attachment eye, while the cross-pin passes through the final chain link. Pull bears from the eye into the body and from the link into the pin. The closed shackle transfers the load between those contacts. Retaining its pin prevents that boundary opening; room to articulate must also suit the actual joint. This differs from the earlier traditional anchor ring, which is a separate ring already fitted through the shank eye. Rocna’s identified bow-and-pin arrangement.

A joining shackle closes a different break in the route, between chain lengths. The example in Practical Shipbuilding has a U-shaped body and a flush cross-bolt, with a smaller pin retaining the bolt. The two chain ends bear at opposite parts of the reclosed connector. A Navy detachable joining link instead uses interlocking components and its own retaining pin. Both reconnect lengths, but they are not the same hardware. A connector that holds the tensile load must also clear the guides and fit any wheel it is expected to pass; being called a joining shackle does not establish that compatibility. Practical Shipbuilding, article 73, page 204.

Let part of the connection extend

Chain tolerates seabed rubbing differently from exposed rope, while a suitable rope can provide much more recoverable extension. The distinction brings our earlier material lessons into the anchoring route. Smyth recorded hemp and coir cables in 1867, including coir’s use aboard Calcutta pilot-brigs. Those were actual fibre choices for this duty, not stages in a universal march towards chain.

Hemp cordage and manila rope carry their previously examined fibre, construction and handling properties into a rode. Coir can offer a light, springy connection, but its bulk for a required strength and its wear at a guide still matter. The line and the fittings must accommodate those properties together. A historical coir cable is not a specification for substituting any available natural rope in a modern installation.

Suitable nylon, or polyamide, rope can extend substantially under a changing pull and recover much of that extension as the pull falls. That gives a moving boat more distance over which its load can change. In a mixed rode the rope length can supply this effect directly. An all-chain rode can acquire a separate elastic branch.

A chain hook engages a particular link and passes pull from that metal contact into an attached line. Mantus’s M2 hook has a shaped body receiving the link and a latch intended to keep it engaged when the pull slackens. The seated metal contact carries the working pull; the latch’s retention keeps that contact available through a load change. Hook shape and link size have to match.

From such an attachment, a single elastic line can run to a suitably supported cleat on the boat. This is a snubber. When the direct chain between hook and boat has enough slack to let that branch work, the deployed chain pulls through the hook into the snubber and then the cleat. The line lengthens under increased tension, storing energy and spreading the change over movement. If the direct chain becomes taut, it supplies another load path and limits that movement. The cleat and its foundation receive the snubber’s pull; the branch has not made the force disappear. Mantus’s hook and elastic connections, pages 12–15.

Elastic stretch supplies the repeatedly recoverable part of this response. Constructional stretch can also change the length as a new laid or braided line beds into loaded geometry, but that settling is not a fresh cushion renewed identically at every pull. Creep is continuing extension under sustained loading and belongs to a different timescale. These effects can coexist in a working rode; calling all observed movement stretch would obscure which length changes return.

The earlier fibre comparison now has a particular job. A floating polypropylene line is not selected for cushioning simply because it floats. Low-extension HMPE, including Dyneema or Spectra fibres, can serve a compact loaded attachment, while the longer nylon branch supplies useful elastic movement. The extension of the complete working length matters to this moving boat.

Divide the attachment between two bowside points

An anchor bridle divides the boat attachment into two legs. Mantus’s Universal arrangement gives us a specific route: a spliced eye on one nylon leg fits the port bow cleat, and an eye on the other fits the starboard bow cleat. Both legs run forwards to a common junction, whose thimbled eye connects through a shackle to the chain hook. Chafe protection at the boat-side contacts protects the working rope where it bears.

Follow an incoming pull from the anchor. It reaches the selected chain link, then the hook and common attachment, before dividing into the two nylon legs. Each leg pulls on its own cleat. The cleat bases and their supporting deck structure receive two separated reactions. That gives the load a different route into the yacht from a single snubber secured at one point.

The earlier angled-bridle comparison still applies. Suppose both legs are taut, equal and arranged symmetrically about a centred pull. Their sideways force components cancel at the common junction, while their components along the incoming pull add to oppose it. The legs can then have equal tensions, but each tension is greater than half the total opposed pull whenever the legs are angled away from that direction. Spreading them wider increases the tension needed to provide the same useful component.

Now move the pull to one side. The geometry and extensions change, so equal sharing is no longer assured. If one leg becomes slack, it supplies no tensile reaction until it takes up again. The two actual attachment paths therefore matter more than the word two. This is an assumed force comparison, not a measured load rating for the product.

The nylon in both legs can still extend. Their elasticity and the bridle’s geometry are separate contributions: changing the fibre affects extension, while changing the angle affects the components of the leg forces. A stiff bridle can divide an attachment without providing the same cushioning. A single nylon snubber can cushion without dividing the load between two sides.

Support the weight hanging between the ends

The deployed chain has weight: gravity pulls it down, with buoyancy reducing its apparent weight in water. Its upper connection must support the suspended portion as well as transmit the pull towards the anchor. A flexible line carrying its distributed weight between supports hangs in a curve. The idealised curve is a catenary.

For a hanging span in a simple steady model, tension acts along the line. Its vertical components support the span’s weight; its horizontal component transmits the pull across it. An anchor rode can also have a length resting on the seabed, which supports that part directly. The hanging curve then meets a bottom-supported length rather than continuing as one free curve between two elevated supports.

As the boat pulls farther away, it can lift more chain from the bed and reduce the sag of the suspended part. Raising that weight requires work and stores gravitational potential energy. Some movement is therefore obtained by changing the chain’s position without appreciably stretching its metal. At high tension much of the useful sag can disappear. Further movement then depends more heavily on material extension and other parts of the system; heavy chain does not provide unlimited geometric cushioning.

A snubber extends within its material and construction. A catenary changes the position of a weighted line. Both can accompany motion at the boat, but they are different mechanisms and can run out of useful movement in different ways. MARIN’s study of anchor-chain loads distinguishes these states explicitly; its large-ship stopping calculations are not needed to recognise the geometry. MARIN, Planet V study, pages 9–13.

State both lengths before comparing them

A historical depth may be recorded in fathoms. An ordinary fathom is six feet, or 1.8288 metres. Smyth related the name to the span of outstretched arms, but reading the unit does not require measuring a particular sailor. Taylor’s 1934 test table states a water depth of 3½ fathoms: 21 feet, about 6.4 metres. The table’s separately stated cable lengths are different measurements. A depth written in fathoms is not automatically the amount of cable deployed.

Anchor scope compares deployed rode length with the vertical distance from its attachment on the boat to the seabed. Both lengths must use the same units. Suppose an illustrative boat has its attachment one metre above the water, with five metres of water beneath that surface. The relevant vertical separation is six metres. Thirty metres of deployed rode divided by six metres gives a scope of five, written 5:1.

The denominator is not merely a depth-sounder reading. That reading may start at the transducer, its underwater depth sensor, or another selected reference; the scope comparison needs the entire vertical distance from attachment to bottom. Nor is the denominator the hull’s draught. Draught tells us how far the boat extends below the waterline, a separate clearance question.

With the vertical separation held fixed, greater deployed length permits a shallower lead towards the anchor. The actual lead also depends on tension, sag and any length supported on the bed. A lower pull can help the chosen anchor remain in its intended engagement, whereas a steeper pull can change the turning tendency at its holding body. The ratio describes available geometry; it does not establish a universally safe setting, bottom or load. Fortress’s stated scope endpoints.

Let the water level and the boat change position

The tide is the periodic rise and fall of water level. Raise the water by two metres in our example, while the floating boat retains the same loading and one-metre attachment height above the surface. The attachment-to-bottom separation becomes eight metres. The same thirty metres of rode now gives 30 ÷ 8, or 3.75:1. Forty metres would restore the illustrative 5:1 ratio. These numbers describe a change in geometry, not an instruction to use either length.

Falling water reverses the depth change while reducing clearance under the hull. The yacht’s draught does not increase merely because the tide falls: the seabed comes closer to its immersed parts. Shoal water, grounding and suitable supported drying therefore return as different possible conditions inside the same anchoring system. Extra stored mass can independently increase immersion or change trim, so loading remains part of the clearance comparison.

A tidal stream is horizontal water movement associated with the tide. It is a current, distinct from the rise or fall of water level itself. Wind and other causes can produce currents too. A stream acts on the immersed boat and can change the pull on the rode or the heading that balances the other forces. It does not change scope merely by being called tidal; the water-level change changes the vertical separation. Local high or low water does not, by itself, establish when the current becomes slack. NOAA’s tide/current distinction and its location-dependent timing explanation.

Keep the anchor fixed and let wind or stream change direction. The boat can move around that restraint, with the horizontal reach of its rode and its own length determining how far its extremities can sweep. This possible swept area is its swinging circle. The bow attachment is not the boat’s centre: the stern extends beyond it, and yaw changes the outline occupying the water. Sag and differing loads change the reach, so the actual movement need not draw one exact circle.

More rode can increase that possible reach even while improving the available pulling angle. Less room to swing is not proof of sufficient depth, and sufficient depth is not proof of room between neighbouring boats or the shore. A lee shore remains downwind. If the anchor drags, wind can consume the room between yacht and land; that translation of the anchor differs from swinging around a fixed one.

The earlier mizzen lesson showed how an aerodynamic force well aft can turn the boat. A small riding sail uses that position to help steady heading while the bow is restrained by its anchor connection. In Jim Grant’s documented arrangement, the sail is hoisted at the backstay and sheeted forwards to one side. Its aft force and the bow’s restraint create a heading tendency rather than primarily providing forward travel. His offset arrangement also differs from a centreline setting that can fill alternately on opposite sides and contribute to oscillation. The sail changes the balance; it does not abolish yaw or fix the whole swinging area. Grant, Using an Anchor Riding Sail, 2015.

Bring the rode across the bow

We have followed the boat’s pull towards the ground. Follow the equipment inwards now, towards the places where it is hauled and put away. At an open bow lead, a bow roller supports the passing rode on a turning surface. Its channel helps retain the lead; the roller turns on a transverse axle held between the bracket’s sides. Contact as the rode changes direction passes a reaction through roller, axle and bracket into the bow structure.

Mantus’s BR1 assembly has two channelled rollers along a supporting bracket. The axle positions and bracket place the contacts; the base transfers their reactions into the mounting. A roller reduces sliding at that contact, but its presence does not establish that any anchor body will clear the stem or seat securely there. The anchor shackle approaches the lead with the shank: its body, pin and available articulation must clear the bracket as the joint changes angle. A tensile connection that fits at the anchor can still foul an unsuitable bow fitting.

A stemhead roller identifies the same kind of working lead by its location at the top of the stem. Discovery’s 55-foot sailing-yacht specification expressly places paired-roller assemblies there and seats its Delta anchor at the stemhead fitting. The location keeps the recovered anchor’s support out at the bow while allowing its chain to lead aft. This is a documented complete-yacht use alongside the separately illustrated Mantus component, not a claim that Discovery installed that particular bracket. Mantus’s roller assembly, page 8; Discovery 55 specification, page 8.

Another arrangement brings the cable through a boundary rather than over an open roller. A hawsehole is that opening for an anchor cable or other heavy line. A hawsepipe provides the lined passage through the hull or deck structure. Follow the cable from the outer opening towards its inner exit: where it bears and changes direction, the lining receives contact and passes the reaction into surrounding structure. The opening and the passage are related, but the hole is not itself a rotating guide.

Water can follow the cable inwards. The traditional arrangement described in Practical Shipbuilding intercepts water behind the bow openings with a manger board, a barrier directing it towards scuppers. An alternative raises the passage’s inboard lead. These are particular ways of managing that route, not proof that a pipe seals the hull. The deck lesson’s distinction between a controlled opening and an unintended leak still applies. The outside hawse passage will also remain distinct from the pipe leading recovered chain down into storage.

Turn a wheel that matches the chain

An anchor windlass supplies driven hauling motion to the rode. Manual machinery obtains work from the crew through handles, bars or gearing; powered machinery obtains it through a motor and drive. Both need a rotating surface that can transfer the machine’s force into rope or chain, and both need a foundation to carry the reaction. The manual capstan’s force-and-travel bargain has not disappeared when power replaces the walking crew.

For chain, the working wheel has pockets shaped to receive successive links. This is the gypsy. As the wheel turns, a seated link bears against a pocket, receives a pull and moves on, while following links engage in succession. Link size, shape and pitch (the repeat spacing along the chain) must suit those pockets. An ill-fitting length or joining shackle cannot be assumed to pass correctly just because it is strong enough in tension.

Wildcat is another name for this chain-engaging wheel, used in the Navy’s terminology and John Muir’s comparison of names. Gypsy and wildcat identify the same working component here. Its link-to-pocket bearing differs from a rope drum’s frictional grip on wraps. A windlass can incorporate both surfaces without making their contact mechanisms identical.

Lewmar’s V8–V12 manual gives us an identifiable powered example. A motor and gearbox drive the main shaft. The vertical shaft directly turns the capstan drum above it. The chain gypsy can be coupled to that turning assembly by teeth, or dogs, on the underside of the capstan engaging matching spaces in the gypsy. With those members engaged, torque passes from shaft to drum, through the dogs and into the chain wheel.

That coupling is the windlass clutch. In this design, raising the capstan withdraws the dogs and disengages the gypsy from its drive. The drum and chain wheel can then perform different movements. This machine clutch joins rotating members; it is a different contact arrangement from the rope clutch that grips a passing line. Disengaging the drive does not, by itself, provide a controlled restraint on the freed wheel.

The windlass brake supplies that separate restraint. Lewmar’s selected arrangement tightens a friction band around the wheel’s braking surface. Contact opposes rotation, passing a resisting torque through the band and fixed assembly into the machine’s support. With the wheel moving, that friction can control payout while converting mechanical energy into heat. With the wheel stationary, the applied brake can resist the torque tending to turn it. Those are two states of the same contact.

The previously taught pawl is a different mechanism again: an engaged catch bears against teeth and resists motion in its restrained direction. The clutch transmits drive, the brake restrains through friction, and a pawl restrains through a catch-and-tooth contact. Knowing these jobs prevents the name of one small fitting from standing in for the whole holding system.

The windlass body is secured to its mounting; in the Lewmar installation, studs and a plate beneath the deck clamp that connection. Its drive also needs clearance below. The surrounding deck and supporting members carry the forces and torques onwards. Sealing the opening protects the water boundary, while the connection’s structure carries the machinery load. Neither sealant nor an electrical supply performs the other’s job. Lewmar V8–V12 manual, pages 6–8 and 19–23.

Give the held load its own support

After hauling, a chain stopper can receive the deployed chain’s pull directly. In the guillotine arrangement documented aboard Norcape, a bar is lowered across the chain’s passage and retained by a pin. An engaged link bears against the bar; the bar passes the reaction into its landing and housing, then the foundation. Chain cannot continue through while that contact is properly established. The inboard length need no longer put the full anchoring pull through the windlass.

This is a stopped length of chain rather than a restrained rotating wheel. An arrangement using a hinged pawl against the chain makes another kind of stopper contact; the actual engaged surface still needs identification. Norcape’s stopper retaining pin is also separate from the cable’s terminal pin inside the locker. MAIB’s Norcape stopper description and figure 15, pages 24–25.

An anchor bitt supplies a fixed support around which an anchor cable can be secured. Practical Shipbuilding’s paired riding-bitts show how substantial that support could become. Two upright posts carry a crosspiece. The incoming chain leads aft from the hawse side, turns around the protected bitt-head and crosspiece region, and leaves towards the locker. The curved contact makes the cable bear against those fixed members instead of passing straight through. It is the depicted chain turn, not a universal figure-eight fastening for every cable.

Trace the forward pull into the structure. The posts are bolted to deck beams and extend down to connections at the beams of the orlop, a lower internal deck. Two forward braces, called standards in this account, extend from the bitts along successive deck beams. Their connections spread the resisting reaction into more of the ship. Iron protection at the post heads and crosspiece takes contact from the chain while the supporting timber assembly carries the load farther into the hull.

The example’s variants include iron bitts and different crosspiece arrangements. The principle remains fixed bearing and supported retention. It differs from capturing a single link in a stopper and from driving successive links around a gypsy. We have changed both the cable’s contact and the members receiving it. Practical Shipbuilding, article 74, page 205, figures 7–8.

A devil’s claw is a particular chain grip connected to a securing or tensioning member. Muir’s documented assembly puts the claw on a link and connects it through a threaded adjuster to a locked arm and the stopper housing. Taking up the threaded connection draws in the chain; the arm’s retained position and the base carry that restraint into the deck. The catalogue specifies its job as securing a stowed anchor underway. That duty must remain attached to this example: it is not evidence that this claw replaces an anchored-load stopper in every condition. Muir commercial catalogue, 2025, page 15.

The snubber and bridle supply yet another branch. Their chain hook takes the pull into elastic rope and separately supported cleats. Muir’s stowage claw takes it through a mechanical take-up to a fixed housing. Norcape’s bar catches a link directly. Each can contact chain, but its route, movement and assigned duty tell us what it is doing.

Make room for what comes aboard

The chain leaving the hauling wheel has to go somewhere. A chain pipe, also called a spurling pipe, leads it from the machinery’s discharge into the chain locker, the compartment storing the recovered chain. Its upper mouth receives the departing length; its lower outlet delivers that length above the stored pile. This deck-to-storage passage has different endpoints from the hawsepipe connecting the outside cable with the vessel’s interior.

Gravity draws the returning links down, and they accumulate on the locker floor. The supported pile passes its weight into that floor and the surrounding structure. John Muir’s drawn arrangement makes the necessary space visible: there must be room for chain to fall between the outlet and the top of the heap. Measuring only to an empty locker floor misses the reduction in clearance as more chain arrives. A heap reaching the delivery point can obstruct the wheel’s discharge even while empty volume remains elsewhere. Muir, Secrets of Anchoring Systems, Part I, pages 3 and 19.

The chain locker therefore has several connected requirements: supported weight, useful fall, access to the accumulated length and a route for water accompanying it. It occupies part of a bow that may be narrowing rapidly. More capacity uses volume as well as mass, and the structure supporting the gear consumes additional space. Recovering heavy chain and an anchor also brings their weight back into the yacht’s loading condition, where position affects trim and immersion.

Bavaria’s Vision 46 manual provides a real drainage comparison. Chain from its foredeck windlass enters the forward locker. Its plans identify two locker drains through the bow skin, separate from the interior bilge-pump system. That gives shipped water and wet-chain drainage an exit from this particular compartment; it does not establish that every locker drains into the bilge or has the same floor construction. Access remains necessary because a drain and a chain-delivery path can be obstructed independently. Vision 46 manual, pages 44–45, 49 and 70–71.

The unused inboard length eventually ends. Its bitter end is the retained terminal end aboard, not a loose working end available to run out unrestrained. Retaining it prevents the entire cable from disappearing overboard. The normally deployed load should be understood at its working holder; the terminal attachment supplies a different final connection. Smyth’s historical bitter-end usage places the inboard cable behind the bitts. A later locker attachment preserves that terminal role without necessarily preserving the same deck layout.

An anchor well is a bow recess arranged to receive an anchor or its gear. It can overlap the chain-storage arrangement on some boats, but names a receiving space rather than the outside support of an anchor at the stem. The Tanzer 22’s self-draining well lies beneath a removable foredeck hatch. Turnbuttons retain the cover, a safety-line eyestrap provides an attachment in the well, and a through-hull drain gives water its exit. Closed, the hatch extends the working deck; open, it gives access to the recess. Its drainage and access make it a different arrangement from simply leaving gear loose behind a rail. Tanzer 22 Owner’s Guide, pages 20 and 34.

Discovery’s larger yacht combines deck access, a self-draining anchor well and a retained bitter end with a separately housed windlass motor and its stemhead anchor support. These are different places for different parts of the equipment. A locker contains chain; a roller or other support receives the anchor’s body; machinery supplies movement between the deployed and stored states.

Release the ground, then support the anchor

To weigh anchor is to raise it from the seabed and recover it. Begin with the anchor set. Its holding ground is still bearing against the engaged fluke or body, so the first recovery load is not explained by the anchor’s weight alone. Changing the cable lead towards an anchor below the boat alters the force and turning tendency at that engagement. Once the selected anchor breaks free, its suspended weight and the hanging rode replace the former bottom-holding reaction as the principal loads to be raised.

An anchor dragged unintentionally across the ground and an anchor deliberately released for recovery can both move. The difference is the working state: the first has failed to maintain the intended restraint, while the second is being taken out of that duty. Breaking a hold in sand or mud and freeing a part caught against a hard feature can also demand different contact changes. No single pull direction guarantees release from every obstruction.

Now the machinery brings the anchor towards the bow. The body that was useful under water has projecting points, broad faces and possibly a stock that must clear and find support aboard. Hauling its cable is only the first part of handling that shape.

Lift the two ends of a traditional anchor

Dana’s 1847 account separates the work into two lifts. A cathead is a beam projecting from the bow, placing an overhead support outboard of the ship’s side. Beneath it, the cat tackle hooks its lower block into the recovered anchor ring. Hauling the tackle’s fall raises that ring end towards the cathead.

The ring now carries a lifting contact in addition to its earlier cable connection. Load passes from ring to block and the tackle’s supporting rope parts, then into the projecting beam and ship. The known purchase relationship trades hauling distance for reduced effort; the cathead still receives the tackle’s support reaction. Practical Shipbuilding illustrates cathead support through a knee bolted to beam and side, with alternative arrangements for the inboard tail. Those are documented ways to connect the projection, not a hidden fastening schedule supplied by Dana.

A separate cat-stopper then retains the raised ring. In Dana’s arrangement it passes through the ring and a chock in the cathead before being secured. Its stationary support frees the lifting gear from carrying that end indefinitely. The shank still reaches down towards the crown and arms; lifting the ring alone has not placed the whole anchor in its final attitude.

The fish tackle does the next job at the fluke end. Its fish hook engages the inner fluke. From that hook a pennant leads up over the sheave at a separate fish davit, rigged across the forecastle, then inboard to the tackle’s moving lower block. Hauling the tackle draws that end of the pennant inboard and raises the hook and fluke outside. The davit receives the pennant’s turning reaction, with guys at its outer and inner regions retaining the projecting support. The tackle also needs its own fixed shipboard attachment; Dana does not locate that attachment in this account. His identified route separates the fluke lift from the cathead’s ring-end support.

Raising the inner fluke brings the lower part up while the ring end remains supported. The anchor changes attitude between those contacts. Its crown remains the arm-to-shank junction within the moving body, not the point hooked by either tackle. The broad palm formerly bearing in the bed is now part of the suspended fluke; Dana specifies the fish hook at the inner fluke, not a sling spread across the whole palm.

After the lift, the shank-painter passes under the inner arm and shank and is secured inboard at timber-heads. It supplies the later support at that end. The same arm that carried reaction from the buried fluke now receives a supporting contact from this retaining member. A protective shoe is placed between the anchor’s bill and the ship’s side: the point that helped enter the bottom would otherwise be an unwelcome concentrated contact against the hull.

Ring-end lift, ring retention, fluke-end lift and supported stowage are distinct transfers. The stock’s transverse projection must also clear the ship and nearby gear through those movements. This is why the recovered Fisherman or Admiralty-pattern stock anchor cannot be understood merely as a weight pulled up to a hole. Dana, The Seaman’s Friend, chapter XVI, “To cat and fish an Anchor”.

Fit the recovered shape to its own support

In the stockless ship arrangement, the cable draws the shank into a compatible hawsepipe and the pivoting head can settle against the outer bow support. Without the long transverse stock, the body has a different envelope to accommodate. The hawsehole is still the exterior opening, and the pipe still guides the cable and receives contact; here its geometry also participates in stowing the anchor. Dana’s traditional anchor instead remains handled and supported outside the bow after its cable has reached that opening.

The yacht’s bow roller offers another route. Discovery documents a Delta plough seated at its stemhead fitting. Its fixed shank and body have to match that support and clear the stem as they arrive. Taylor’s hinged CQR presents an additional articulation, so the support has to suit that particular recovered shape. Lewmar’s curved claw has a fixed shank and a broad, three-dimensional body with different contact points. The fact that a catalogue shows either anchor’s dimensions does not establish a fit on Discovery’s roller or on any other unexamined bracket.

Fortress gives a different flat-fluke stowage answer. Its broad flukes pivot relative to the shank while assembled, and its interlocking aluminium-alloy components can be dismantled for compact storage. Removing the retained connections separates parts that otherwise make a wide working envelope. A storage bag accommodates those parts and their assembly hardware. That trades immediate assembled readiness for a smaller package; it does not reproduce the traditional ring-and-fluke lifting arrangement. Fortress’s disassembly and storage.

The grapnel’s several arms likewise project in different directions when open. Attwood’s documented folding version closes them towards the body and locks the folded state, reducing the spread that must be accommodated in a recess or elsewhere aboard. Luke’s separable stock anchor answers storage through detachable members instead. Folding an arm, pivoting a head and dismantling a joint are different ways of changing the recovered envelope.

Meanwhile the chain follows its own route through the guides, past the hauling wheel and down the chain pipe into the locker. An anchor well can receive a suitable body or its loose gear, with access and drainage as in the Tanzer example. It is not the same support as a cathead holding a ring outside the bow. Recovering all the chain does not, by itself, settle where the bill, crown, flukes and stock of the anchor will rest.

The ground tackle is now a complete working system: bottom contact, tensile connection, hauling and holding routes, boundary passages and supported storage. The recovered equipment must remain secured while the yacht moves, just as the deployed equipment needed a continuing load path while the yacht was held.

Use the holding point to move the boat

Anchor names can identify service rather than shape. A bower anchor is a principal anchor carried ready for ordinary anchoring, traditionally at the bow with its cable available. A kedge, or kedge anchor, is a smaller anchor used for positioning or supplementary holding. Neither role dictates one stock or fluke geometry, and smaller is relative to the particular vessel’s equipment.

A stream anchor is another traditional lighter or supplementary role whose exact duty belongs with its vessel. Gabriel Bray’s drawing aboard Pallas on 29–30 January 1775 distinguishes a large bower and a smaller stream anchor above it. The museum’s account identifies the latter as equipment that could be carried away in a boat to haul the ship off a shoal or help manoeuvre when sails could not provide the needed movement. Its cable then supplies restraint towards the laid-away holding point. The record does not require us to invent a fixed size ratio or a complete three-anchor inventory aboard Pallas. RMG, Bray’s Pallas anchors.

Kedging uses such a laid-away anchor to move the vessel. Imagine the anchor holding ahead and to one side, with its cable returning to the yacht. Hauling that cable shortens the distance between the boat and the fixed bottom reaction. If the hold is maintained and the hull can move, the boat is pulled towards the anchor. The moving endpoint is now the boat, rather than the anchor being raised aboard.

Dana gives a particular comparison with a rock or shoal close astern: a kedge is laid from the starboard bow on a substantial rope, then the ship is hauled ahead towards it. The available direction and room matter because the pull cannot move the yacht arbitrarily sideways or through an obstruction. A kedge is the equipment; kedging is the operation. Weighing eventually recovers that equipment and removes the fixed reaction it had supplied.

Retain the last connection

One final fitting completes the inboard route. A bitter pin is a securing pin associated with the terminal end of an anchor cable. Norcape’s MAIB report supplies a specific example: the last chain link was retained by a removable pin at the chain-locker bulkhead, with the pin accessible at the bulkhead’s outside face.

If that end is loaded, the link bears on the pin and the pin passes the reaction into its supported attachment. The bitter end is the location on the cable; the bitter pin is a component retaining it. The deck stopper normally receives a different working load, while a windlass pawl acts at machinery teeth. These three small-looking restraints have different contacts and foundations.

Norcape’s initial attempt to release the terminal pin under load was unsuccessful. Removable construction therefore does not prove release is available in every loaded condition. The point of following this connection is to understand where the last load can go, not to infer an emergency procedure from the pin’s name. MAIB, Norcape, section 1.3.4 and figure 5, page 10.

At anchor, the boat has been restrained through a connection led towards the bottom, while remaining able to change heading and position around it. Beside a quay or another fixed attachment, the desired restraint changes. The next task is to place lines so that each opposes a particular movement, then provide the contacts that keep the hull from bearing directly on its neighbour.