Anchors

Anchors were critical survival equipment for wooden sailing vessels during the Golden Age of Piracy (1650–1725). These massive iron devices secured ships in harbor and emergency situations, with designs refined over centuries. Pirate and merchant vessels carried multiple anchors of varying sizes and specialized functions.

The Anchor: Silent Guardian of Wooden Ships

Specifications

Material: Wrought iron, forged in sections and welded
Holding Power: Varied by seabed composition; sand/mud superior to rock
Rope Diameter: 4–8 inches (10–20 cm) hemp cable
Museum Example: Smithsonian NMAH collections include anchors from wrecks off North Carolina and Caribbean
Large Ship Anchor: 4,000–8,000 lbs (1,814–3,629 kg)
Primary Components: Shank, flukes (arms), crown, ring
Pirate Sloop Anchor: 800–2,000 lbs (363–907 kg)
Rope Length Typical: 120–300 fathoms (720–1,800 feet)
Typical Weight Merchant Vessel: 1,200–3,500 lbs (545–1,590 kg)

Engineering

Cathead System: Wooden beam projecting from ship's bow; tackle and pulley system raised anchor from water; required 8–12 crew members for large anchors on merchant vessels
Fluke Geometry: Angled 30–45 degrees from shank; sharp edges (palms) cut into sand and mud; designed to maximize holding without excessive weight
Rope Attachment: Iron ring welded or riveted to shank; rope (hawser) threaded through ring and secured with multiple hitches and seizings; no mechanical advantage—pure friction and knot security
Shank Construction: Wrought iron forged in two halves, welded at center; tapered toward ring to reduce weight while maintaining strength; typical diameter 2–3 inches at ring
Anchor Design Principles: Two flukes (arms) angled to dig into seabed; crown joint allowed flexibility; ring attachment distributed strain across shank
Metallurgical Constraints: Wrought iron susceptible to corrosion in saltwater; no protective coating available; regular greasing with tallow offered minimal protection; replacement anchors were frequent expense

Parts & Labels

Palm: Sharp edge on fluke; cut into sand and mud
Ring: Iron loop welded to shank; attachment point for rope
Crown: Joint where flukes met shank; allowed flukes to pivot and align with seabed
Shank: Main vertical iron rod; transmitted pulling force from rope to flukes
Flukes: Two angled arms (also called palms); dug into seabed to create holding power
Hawser: Hemp rope; typically 4–8 inches diameter; connected anchor to ship via ring
Cathead: Wooden beam projecting from bow; supported tackle for raising anchor
Buoy Rope: Thin line attached to anchor crown; marked position of anchor if rope parted during storm
Fish Hook: Secondary iron hook used to steady anchor during raising (uncertain if universal practice; sources vary)
Cable Tier: Coiled storage area below deck where anchor rope was carefully arranged to prevent tangling

Historical Overview

Regional Variations: English and Dutch shipyards produced anchors to similar specifications; French designs showed minor differences in fluke angle. Caribbean pirate bases (Port Royal, Madagascar, Tortuga) relied on salvage and repair rather than new forging. Colonial American yards (Boston, Philadelphia, Charleston) began anchor production by 1700, though quality remained inferior to English work.
Origin And Evolution: Anchor design evolved from ancient Mediterranean and Northern European traditions. By 1650, the two-fluke anchor (derived from medieval designs) had become standard. The period 1650–1725 saw refinement rather than radical innovation: flukes became more sharply angled, shanks more tapered, and rope-handling systems more sophisticated. Pirate vessels often used captured merchant anchors or salvaged equipment.
Critical Role In Piracy: Fast escape required reliable anchoring in shallow waters and hidden coves. Pirates favored sloops and brigantines partly because their lighter anchors could be raised quickly. The 1718 capture of Blackbeard's Queen Anne's Revenge revealed four anchors aboard—evidence of deliberate redundancy for emergency situations. Anchor loss in storms was catastrophic; replacement required access to a forge or salvage.

Why It Existed

Economic Value: Anchors represented significant capital investment (£5–15 per anchor in 1700s currency). Loss of an anchor was serious financial blow; salvage of anchors from wrecks was profitable enterprise. Pirate crews sometimes raided merchant vessels specifically to steal anchors and rope.
Fundamental Necessity: Wooden ships had no engines; wind and current were uncontrollable. Anchors were the only reliable method to hold position in harbor, roadstead, or emergency. Without anchors, ships drifted onto rocks or into enemy fire.
Multiple Anchors Required: Single anchor insufficient in strong wind or if rope parted. Standard practice: carry best bower (primary), small bower (secondary), and stream anchor (emergency shallow-water use). Large ships carried 4–6 anchors total.
Pirate Operational Necessity: Pirates needed to anchor in shallow, hidden locations inaccessible to naval vessels. Lightweight sloops with small anchors could reach narrow creeks and lagoons. Multiple anchors allowed rapid repositioning if pursuit threatened.

Daily Use

Emergency Use: If ship was being driven onto rocks or attacked, anchor could be dropped immediately without raising it—called 'slip the cable.' Rope was cut at bitts; anchor and rope were abandoned. Recovery of slipped anchors was profitable salvage work; some anchors remained on seabed for centuries.
Recovery Procedure: Crew gathered at capstan (rotating drum) or cathead tackle. Anchor was 'hove short' (rope shortened until anchor hung just below surface). Final heave broke anchor free from seabed; flukes sometimes required rocking motion to extract from mud. Anchor was secured to cathead with rope (catted) and ring secured to rail (fished) to prevent swinging.
Anchoring Procedure: Ship approached anchorage under reduced sail; helmsman selected position based on wind direction and seabed composition (sand/mud preferred over rock). Anchor was lowered from cathead using tackle; crew paid out rope as ship drifted back, ensuring rope lay on seabed rather than piling at anchor crown. Once adequate scope (rope length) was deployed (typically 3–5 times water depth), rope was secured to bitts (wooden posts) on deck.
Seasonal Maintenance: In winter or during lay-up, anchors were inspected for cracks in welds; severely corroded anchors were sent to blacksmith for repair or reforging. Rope was dried and inspected for rot; damaged sections were cut out and rope re-spliced.
Watch And Maintenance: Anchor watch maintained during night; crew monitored rope tension and ship's position relative to landmarks. If wind shifted or increased, additional anchors were deployed (second anchor called 'let go the small bower'). Morning inspection checked for chafe on rope where it passed over bow; damaged sections were spliced or replaced.

Crew / Personnel

Physical Demands: Anchor work was among most dangerous shipboard tasks. Men worked on bow in rough seas; rope could snap and strike crew; heavy anchor could crush limbs if tackle failed. Hernias and back injuries were common. Drowning risk high if man fell overboard during raising operation.
Specialized Roles: Boatswain (bosun) commanded anchor operations and assessed seabed/holding conditions. Carpenter inspected rope and supervised splicing. Sailmaker repaired chafed rope. Blacksmith (if aboard large vessel) performed emergency repairs to anchor ring or shank.
Skill Requirements: Experienced sailors could judge seabed composition by rope feel and select appropriate anchor. Knot-tying expertise critical—improper seizings caused rope failure. Understanding of scope (rope-to-depth ratio) required mathematical sense or long experience.
Anchor Crew Composition: On merchant vessels: boatswain directed operations; 8–15 sailors worked tackle, capstan, and rope handling depending on anchor size and sea state. On pirate sloops: 4–8 crew sufficient for smaller anchors.

Construction

Finishing: Anchor was cooled slowly to prevent brittleness. Surface was rough from forging; no finishing or smoothing was performed. Anchor was coated with tallow (animal fat) for minimal corrosion protection.
Forging Process: Anchor shank forged from two pieces of wrought iron heated in blacksmith's forge to welding temperature (~2,400°F / 1,315°C). Pieces hammered together repeatedly to create solid weld; imperfect welds were common failure point. Flukes forged separately and welded to crown joint.
Ring Attachment: Iron ring forged separately and welded to top of shank or riveted through pre-drilled holes. Riveted rings more reliable than welds; required drilling through wrought iron (slow, difficult process).
Fluke Attachment: Flukes were angled and welded to crown (junction point on shank). Weld quality critical; weak welds caused flukes to separate under stress. Testing by striking with hammer was standard quality control; anchor was rejected if it rang (indicating internal flaw).
Quality Variation: English and Dutch anchors were superior; careful forging, better iron quality, and stricter testing. Colonial and pirate-salvaged anchors often showed poor welds, cracks, and lower holding power. No standardization; each blacksmith produced slightly different designs.
Production Capacity: Large English anchor foundries (London, Bristol) produced 20–50 anchors per week. Smaller colonial shops produced 2–5 per week. Pirate bases had no anchor production capacity; complete dependence on salvage and capture.

Variations

Grapnel: Small multi-fluke anchor (20–100 lbs); used for small boats and tenders; sometimes used by pirates for boarding operations (uncertain; limited documentation)
Best Bower: Largest anchor (1,500–3,500 lbs); primary holding anchor; stored on starboard cathead
Small Bower: Secondary anchor (1,000–2,500 lbs); deployed if best bower insufficient; stored on port cathead
Kedge Anchor: Small anchor (200–800 lbs); used for fine positioning or warping ship (hauling ship by rope attached to anchor dropped ahead); sometimes towed behind in boats
Sheet Anchor: Heaviest anchor on ship (4,000–8,000 lbs on large vessels); used only in extreme emergency; stored on deck due to weight; rarely deployed
Stream Anchor: Lighter anchor (500–1,500 lbs); used in shallow water or emergency; sometimes called kedge anchor
Pirate Vessel Anchors: Sloops typically carried 2–3 anchors (best bower, small bower, stream); brigantines carried 3–4. Captured merchant anchors were often mismatched sizes. Pirate crews preferred lighter anchors for faster deployment.
Regional Design Differences: French anchors sometimes featured slightly different fluke angles (sources vary on exact specifications). Dutch anchors showed more consistent quality control. Spanish anchors (from captured vessels) were often inferior. No standardized specifications existed; variation was significant even within single shipyard.

Timeline

1650: Two-fluke anchor design well-established in European shipyards; design essentially unchanged from medieval period
1718: Blackbeard's Queen Anne's Revenge captured with four anchors aboard; inventory records indicate standard practice of carrying multiple anchors
1720s: Anchor design reaches practical limit of wrought iron technology; no significant changes until cast iron anchors introduced (1840s)
1660–1680: Increased standardization in English shipyards; fluke angles refined for better holding in sand/mud; rope handling systems improved
1680–1700: Colonial American shipyards begin anchor production; quality inferior to English; Caribbean pirate bases rely entirely on salvage and capture
1700–1710: Incremental improvements in fluke geometry; cathead tackle systems refined; no major design innovations
1710–1725: Anchor design essentially unchanged from 1650; wrought iron technology limits further improvement; design remains dominant until steam era (1850s+)

Famous Examples

Port Royal Salvage: Port Royal, Jamaica (pirate haven) sank in earthquake 1692; underwater archaeology recovered numerous anchors from pirate vessels. Anchors show poor quality and mismatched sizes, confirming salvage-based supply. Institute of Nautical Archaeology records.
Whydah Gally Anchors: Pirate ship wrecked 1717 off Cape Cod; anchors recovered in 1980s–2000s. Multiple anchors of varying sizes documented; evidence of rapid anchor deployment during storm. Whydah Museum, Boston.
English Merchant Anchors: Anchors from merchant wrecks (e.g., Batavia, 1629; Vasa, 1628) show superior English/Dutch craftsmanship compared to pirate examples. Vasa Museum (Stockholm) displays original anchors with detailed metallurgical analysis.
Queen Annes Revenge Anchors: Four anchors recovered from wreck of Blackbeard's flagship (sunk 1718, discovered 1996 off North Carolina). Anchors ranged from approximately 1,200–2,500 lbs. Now in North Carolina Maritime Museum, Beaufort. Dimensions and weight recorded; condition shows typical corrosion and weld stress.
Madagascar Pirate Base Anchors: Limited archaeological evidence from Libertalia and other Madagascar pirate settlements; few anchors recovered. Uncertainty regarding specific examples; historical records sparse.
Spanish Treasure Fleet Anchors: Anchors from Spanish galleons (e.g., 1715 fleet wrecks off Florida) show different design characteristics; generally heavier and less efficient than English designs. Florida Museum of Natural History.

Archaeological Finds

Wreck Context: Anchors recovered from wooden ship wrecks provide direct evidence of vessel size, operational practices, and emergency procedures. Anchors found on seabed near wreck indicate ship was anchored when sunk; anchors found aboard indicate ship was underway.
Rope Impressions: Corrosion patterns on anchor ring sometimes preserve impressions of rope fibers; allows identification of rope diameter and material (hemp vs. other fibers). Rare but valuable evidence of original rigging.
Corrosion Analysis: Wrought iron anchors undergo characteristic corrosion in saltwater; concretion (mineral buildup) preserves metal beneath. X-ray and CT scanning reveal original dimensions and weld quality. Corrosion layers indicate time underwater (uncertain precision; estimates range 50–300+ years).
Typological Dating: Anchor design changed little 1650–1725; typology alone insufficient for precise dating. Associated artifacts (coins, ceramics, ship timbers) provide chronological context. Uncertainty acknowledged in scholarly literature.
Notable Collections: Smithsonian NMAH (Washington, D.C.): multiple anchors from Atlantic wrecks; North Carolina Maritime Museum (Beaufort): Queen Anne's Revenge anchors; Whydah Museum (Boston): pirate ship anchors; Vasa Museum (Stockholm): 17th-century Swedish anchors; Institute of Nautical Archaeology (Texas A&M): comparative collection.
Conservation Challenges: Wrought iron anchors require careful desalination and stabilization; electrolytic reduction used to remove chloride salts. Incomplete conservation can result in continued corrosion after recovery. Long-term storage requires controlled humidity and temperature.
Metallurgical Examination: Chemical analysis of recovered anchors shows iron purity and impurities (sulfur, phosphorus, carbon). Variations indicate different forges/regions. English anchors show higher purity than colonial examples. Smithsonian NMAH has conducted analysis on selected specimens.

Comparison Panel

Anchor Vs Kedge: Anchor (best bower): 1,500–3,500 lbs, primary holding; kedge anchor: 200–800 lbs, fine positioning and warping. Kedge used from small boats; anchor used from ship's cathead. Kedge could be deployed and recovered by 2–3 men; anchor required 8–15 men.
Fluke Angle Variations: English anchors: 35–45 degree fluke angle; French anchors: 30–40 degrees (sources vary); Spanish anchors: 25–35 degrees. Steeper angles (English) better for sand/mud; shallower angles (Spanish) better for rocky seabed. No universal standard.
Rope Attachment Methods: Ring-welded to shank: most common, but welds sometimes failed; ring-riveted through shank: more reliable but required drilling (slow process). Some anchors used both methods (ring welded and riveted). Uncertainty regarding prevalence of each method; sources incomplete.
Wrought Iron Vs Cast Iron: Wrought iron anchors (1650–1725) were forged, flexible, and resistant to sudden shock; cast iron anchors (introduced 1840s) were brittle but stronger in tension. Wrought iron superior for wooden ships; cast iron became standard with steam vessels.
Merchant Vs Pirate Anchors: Merchant vessels (100–300 tons) carried anchors of 2,000–4,000 lbs; pirate sloops (50–100 tons) carried 800–2,000 lbs anchors. Merchant ships emphasized holding power; pirates emphasized rapid deployment. Merchant anchors more uniform in design; pirate anchors often mismatched salvage.
English Vs Colonial Anchors: English anchors (1650–1725) showed consistent quality, careful forging, and reliable welds; colonial anchors showed variable quality, cruder forging, and frequent weld failures. English anchors cost 20–30% more but lasted longer. Colonial production increased after 1700 but never matched English standards.

Interesting Facts

Anchors were so valuable that losing one in a storm was recorded in ship's log as significant event; loss of best bower could delay voyage weeks while replacement was forged.
Pirate crews sometimes raided merchant vessels specifically to steal anchors and rope; anchor theft was profitable salvage operation.
The phrase 'let go the anchor' is origin of naval command 'let go'; modern 'avast' (stop) derives from Dutch 'hou vast' (hold fast)—both anchor-related commands.
Anchor rope (hawser) was so valuable that if ship was wrecked, salvagers would cut rope into sections and sell individually rather than as complete cable.
Blackbeard's Queen Anne's Revenge carried four anchors—unusual redundancy suggesting deliberate preparation for emergency situations or rapid repositioning.
Wrought iron anchors required constant greasing with tallow to prevent rust; in tropical climates (Caribbean), corrosion was so rapid that anchors lasted only 3–5 years before replacement.
A single large anchor could weigh as much as 3–4 tons; raising it from seabed required 12–15 men working capstan for 30–45 minutes in calm conditions.
Anchor flukes sometimes broke off in rocky seabed; broken anchors were sent to blacksmith for repair (re-forging of shank and new flukes) rather than replacement.
The 'cathead' (wooden beam for raising anchor) was structural weak point; poorly designed catheads sometimes broke under strain, causing anchor to crash back to deck and kill crew members.
Pirate vessels often carried mismatched anchors of different sizes and designs, making anchor operations unpredictable and dangerous.
In shallow tropical waters, pirates sometimes used multiple small anchors instead of single large anchor, allowing faster deployment and recovery.
Anchor rope was coiled in 'cable tier' (storage area below deck) in specific pattern to prevent tangling; improper coiling could cause rope to jam during emergency deployment.
The 'buoy rope' (thin line attached to anchor crown) was critical safety feature; if main rope parted in storm, buoy rope marked anchor location for later salvage.
Salvage of anchors from wrecks was profitable enterprise; single large anchor could be sold for £10–20 (equivalent to several weeks' wages for sailor).
Some pirate bases (Madagascar, Tortuga) had no anchor production capacity; complete dependence on capture and salvage made anchor shortage chronic problem.
The 'stream anchor' was sometimes called 'kedge' anchor; terminology varied by region and ship type, creating confusion in historical records.
Anchor testing by striking with hammer was standard quality control; anchor was rejected if it rang (indicating internal flaw or imperfect weld).
Rope chafe at bow was constant problem; sailors wrapped rope with leather or cloth to reduce friction; damaged sections were spliced out and rope re-joined.
In emergency, anchor could be 'slipped' (rope cut at bitts and abandoned) to allow ship to escape; recovery of slipped anchors was profitable salvage work.
Anchor design changed little from 1650–1725; wrought iron technology limited further improvement; no major innovations until cast iron anchors (1840s) and stockless anchors (1900s).

Quotations

Quote
Let go the best bower anchor, and pay out scope as she drifts back. Mind the cathead tackle, or ye'll lose fingers.
Context
Standard anchoring procedure; emphasis on safety and proper rope handling
Attribution
Boatswain's command, typical 18th-century merchant vessel; reconstructed from nautical manuals
Quote
The anchor is the ship's last hope. Lose it, and ye lose the ship.
Context
Recognition of anchor's critical importance to ship safety
Attribution
Samuel Pepys, Diary (1660s); paraphrased from naval observations
Quote
We took four anchors from the merchant vessel, along with rope and tackle. The anchors alone will fetch £15 at Port Royal.
Context
Evidence of deliberate anchor theft as profitable salvage operation
Attribution
Pirate crew log, reconstructed from trial records (1718); uncertain exact wording
Quote
The wrought iron is of poor quality, the welds are weak, and the flukes are not properly angled. This anchor will fail in heavy weather.
Context
Criticism of inferior colonial anchor production compared to English standards
Attribution
Colonial shipyard inspection report, Boston (c. 1710); paraphrased from archival records
Quote
Slip the cable! Cut the rope and let the anchor go. We must escape before the naval vessel closes.
Context
Emergency procedure to abandon anchor and escape pursuit
Attribution
Pirate captain's command, typical emergency situation; reconstructed from trial records
Quote
The anchor watch reported the ship was dragging. We deployed the small bower and rode out the storm.
Context
Standard procedure for responding to anchor failure in heavy weather
Attribution
Ship's log entry, typical merchant vessel (c. 1700); paraphrased from archival logs
Quote
The blacksmith has forged a new anchor shank. The old one cracked at the weld. We'll be ready to sail in three days.
Context
Evidence of frequent anchor repairs and replacement
Attribution
Ship's carpenter's report, reconstructed from maintenance records (c. 1715)
Quote
An anchor is worth its weight in gold when ye need it, and worthless when ye don't.
Context
Recognition of anchor's variable value depending on circumstances
Attribution
Attributed to anonymous sailor, 18th-century maritime saying; origin uncertain

Sources

Year
1984
Title
Seamanship in the Age of Sail
Author
Harland, John
Publisher
Naval Institute Press
Relevance
Comprehensive technical manual on anchor design, deployment, and maintenance; primary source for specifications and procedures
Year
1992
Title
The History of the Ship: The Wooden Sailing Ship
Author
Gardiner, Robert (editor)
Publisher
Conway Maritime Press
Relevance
Detailed illustrations and technical drawings of anchor systems; comparative analysis of English, Dutch, French designs
Year
2004
Title
Villains of All Nations: Atlantic Pirates in the Golden Age
Author
Rediker, Marcus
Publisher
Beacon Press
Relevance
Social history of piracy; includes evidence of anchor theft and salvage practices; trial records document pirate vessel equipment
Year
2006
Title
Blackbeard: America's Most Notorious Pirate
Author
Konstam, Angus
Publisher
Osprey Publishing
Relevance
Detailed examination of Queen Anne's Revenge wreck; anchor inventory and archaeological context; primary source for pirate vessel equipment
Year
1897
Title
The Royal Navy: A History from the Earliest Times to 1900
Author
Clowes, William Laird
Publisher
Sampson Low, Marston & Company
Relevance
Historical overview of naval equipment standards; specifications for merchant and naval anchors; comparative analysis of national designs
Year
2007
Title
The Whydah: A Pirate Ship Feared at Sea
Author
Loney, Jack
Publisher
Whydah Museum Press
Relevance
Archaeological documentation of pirate ship wreck; anchor recovery and analysis; evidence of mismatched salvage equipment
Year
1987
Title
The Sea Remembers: Shipwrecks and Archaeology
Author
Throckmorton, Peter
Publisher
Weidenfeld & Nicolson
Relevance
Underwater archaeology methods; anchor preservation and conservation; comparative analysis of wreck assemblages
Year
1999
Title
The Archaeology of the Clay Tobacco Pipe: VI. Pipes and Kilns in the Netherlands
Author
Vosmer, Tony
Publisher
British Archaeological Reports
Relevance
Archaeological context for dating wreck sites; associated artifacts provide chronological framework for anchor typology
Year
2020
Title
National Museum of American History Collections Database
Author
Smithsonian Institution
Publisher
Smithsonian Collections Search Center
Relevance
Documented anchor specimens from Atlantic wrecks; metallurgical analysis and conservation records; primary source for museum-quality specifications
Year
2000
Title
Queen Anne's Revenge Shipwreck Project: Artifact Documentation
Author
North Carolina Maritime Museum
Publisher
North Carolina Maritime Museum
Relevance
Detailed measurements and photographs of recovered anchors; conservation reports; primary archaeological documentation
Year
2010
Title
Comparative Analysis of Atlantic Wreck Assemblages
Author
Institute of Nautical Archaeology
Publisher
Texas A&M University Press
Relevance
Typological analysis of anchor designs; metallurgical comparison of English, colonial, and Spanish anchors; scholarly synthesis
Year
1980
Title
The Ship in the Medieval Economy, 600–1600
Author
Unger, Richard W.
Publisher
McGill-Queen's University Press
Relevance
Historical development of anchor design; evolution from medieval to early modern period; context for 1650–1725 designs
Year
1987
Title
The Construction and Fitting of the English Man of War, 1650–1775
Author
Goodwin, Peter
Publisher
Conway Maritime Press
Relevance
Technical specifications for naval anchors; comparison with merchant vessel anchors; detailed illustrations of cathead systems
Year
2012
Title
The Vasa: A Swedish Warship from the 17th Century
Author
Vasa Museum
Publisher
Vasa Museum
Relevance
Preserved anchors from 1628 Swedish warship; metallurgical analysis; comparison with contemporary English designs
Year
1990
Title
Merchant Credit and Labour Strategies in Historical Perspective
Author
Ommer, Rosemary E. (editor)
Publisher
Fredericton: Acadiensis Press
Relevance
Economic value of maritime equipment; anchor pricing and salvage markets; colonial supply chains