Video
Patreon 36: Repair Ships, Depot Ships, Tenders and Stores Ships...
Study Patreon 36: Repair Ships, Depot Ships, Tenders and Stores Ships..., a Dr. Alex Clarke video from 25 Nov 2021, with 82 time notes. Topics include Depot Ships, Naval Logistics, Naval Maintenance.
Time notes
- 7:52Why fleets need repair and support shipsChapter
The opening definition separates repair ships, depot ships, store ships, and tenders while identifying the common problem they solve: small warships cannot carry every spare or specialist they need.
- 14:22Age-of-sail store ships and self-repairChapter
Store ships carried food, water, sailcloth, spars, and other essentials, but sailing warships also had enough crew, time, and hull space to perform much of their own repair work.
- 15:53Warrant officers as a shipboard maintenance systemNotable Point
Carpenters, sailmakers, boatswains, and pursers connected repairs, stores, and dockyard training in the Royal Navy's age-of-sail support system.
- 20:05Wood stocks and everyday repair work aboard sailing shipsNotable Point
Sailing ships kept rough timber and long spars accessible on the upper deck, where carpenters could inspect, preserve, and shape them for running repairs.
- 22:48From powder monkey to a skilled naval tradeNotable Point
Training as a sailmaker, carpenter, or gunner offered boy sailors a route from powder-carrying work into better-paid and professionally valued trades.
- 24:36QuestionWhat duties did a ship's carpenter have during battle?AnswerQ&A
The carpenter belonged to the damage-control effort, but carpenters on smaller ships could also lead boarding parties because they were skilled with heavy axes.
- 25:49QuestionHow often did crews have to perform the ship's most unpopular maintenance jobs?AnswerQ&A
Bilge pumping was done daily and sometimes two or three times a day, while sails and stores also required daily inspection.
- 27:04Prize crews and promotion for ship's carpentersNotable Point
Repairing a captured ship and bringing it home as acting carpenter could accelerate a carpenter's mate toward his own warrant.
- 28:01QuestionWhat is a spar on a sailing ship?AnswerQ&A
It is one of the long timbers associated with the mast on which the sails are carried.
- 30:15QuestionWere ship's cats a danger to stored sails?AnswerQ&A
The larger danger was rats eating sailcloth, so carpenters and sailmakers valued cats for protecting their stores.
- 31:12QuestionWere auxiliary supply operations carried out at sea in the age of sail?AnswerQ&A
Yes. Boats handled ordinary transfers, while tackles, spare spars, and a mast could be rigged into lifting gear for heavier stores.
- 32:05Why gun carriages dominated post-battle repair workNotable Point
Damaged gun carriages could consume more carpenter effort than hull repairs, forcing ships to carry timber and sometimes heat wood aboard.
- 35:28QuestionDid other navies pioneer the same kinds of shipboard maintenance and support?AnswerQ&A
Yes. Several European navies developed similar practices, but the Royal Navy sustained them with unusual administrative continuity, funding, and national reliance on sea power.
- 37:48USS Celtic and mobile supplyNotable Point
USS Celtic illustrates how a ship formally classed as a store ship could take on supply, maintenance, and humanitarian work over a long service life.
- 40:04Standardization and the rise of shore supportChapter
Mixed machinery and coal dependence made shore bases essential until standardization allowed mobile support ships to carry a practical range of spares.
- 43:45Kamchatka and a fleet without friendly portsNotable Point
The Russian repair ship Kamchatka illustrates the severe support problem created when the Baltic Fleet sailed around the world toward the Russo-Japanese War without a chain of friendly bases.
- 44:30QuestionWas a ship's carpenter also a backup surgeon or blacksmith?AnswerQ&A
Carpenters were repair specialists who could do occasional smithing and needed enough ironworking skill for their work.
- 46:40QuestionDid a repair or support ship accompany the Great White Fleet?AnswerQ&A
Yes. The store ship USS Celtic was one of the auxiliaries that followed the fleet.
- 47:11QuestionDid people in the ironclad era think emerging technologies would make naval ships unnecessary?AnswerQ&A
Yes, such claims recur. Torpedoes, submarines, and other innovations changed warships and warfare without making ships irrelevant.
- 49:19Forward foundries and the spare-parts problemNotable Point
Large overseas bases tried to cast, heat-treat, or repair machinery parts locally because waiting for a replacement from home could immobilize a ship for months.
- 50:39The Great White Fleet's logistics lessonNotable Point
The voyage exposed weak American fleet logistics and dependence on British coal transport, reinforcing the need for a US Navy fleet train of colliers, tankers, and supply ships.
- 52:11QuestionDid Royal Navy overseas stations such as the China Station have their own auxiliaries?AnswerQ&A
Usually they had an auxiliary or similar support ship, often an older cruiser converted to carry stores and provide local services.
- 53:06HMS Ambrose and the depot-ship roleChapter
The conversion of HMS Ambrose from a cargo liner to a submarine and destroyer depot ship shows how a mothership could provide the space a flotilla lacked.
- 58:22QuestionWhere does the naval term tender come from?AnswerQ&A
It describes a vessel that tends to, supplies, or cares for another ship, flotilla, or service rather than one rigid hull type.
- 1:00:54QuestionDid naval tenders also provide recreation for the crews they supported?AnswerQ&A
Yes. Some tenders included recreational facilities such as cinemas alongside their other support functions.
- 1:01:07Treaty limits and USS MedusaChapter
USS Medusa represents a Pacific answer to limited shore infrastructure: if new bases could not be developed, a fleet had to bring repair capacity with it.
- 1:06:44HMS Vindictive as a converted depot shipNotable Point
HMS Vindictive provides a named example of the Royal Navy converting an older cruiser into a depot ship rather than building every support vessel from scratch.
- 1:08:24QuestionHad the Type 83 destroyer already received an official design?AnswerQ&A
No. The government had released no official design at the time, so the circulating images were personal concepts.
- 1:10:01HMS Resource and the cost of specializationNotable Point
HMS Resource and USS Medusa were valuable but expensive answers to a question larger warships partly solved with their own workshops.
- 1:15:22QuestionWhat might a modern battleship armed mainly with missiles look like?AnswerQ&A
The Kirov-class battlecruisers, especially Pyotr Velikiy, provide the closest existing guide to the idea.
- 1:16:20QuestionWould vulnerable Cold War bases make repair ships more important?AnswerQ&A
Potentially, but Cold War planning often assumed a short conventional or nuclear conflict and therefore underinvested in the sustainment needed for a long war.
- 1:20:39QuestionAre repair ships likely to return to modern fleets?AnswerQ&A
Dedicated repair ships are unlikely to return quickly unless fleets grow, while forward tenders combining repair, headquarters, and personnel functions remain useful in a long war.
- 1:24:16Converted tenders as affordable long-war preparationNotable Point
Converting viable cruisers into tenders saved money, supplied the space small combatants lacked, and offered some protection if an enemy attacked the support fleet.
- 1:25:44QuestionCould a landing-platform dock serve as a repair ship for uncrewed surface vessels?AnswerQ&A
Yes. An LPD could use its dock, lifts, gantries, and standardized containers to receive, repair, rearm, and return drones to service.
- 1:27:44HMS Unicorn as forward aviation supportChapter
HMS Unicorn was designed to supply, repair, and redistribute aircraft so carrier groups could preserve their aviation strength far from shore facilities.
- 1:29:10QuestionWould a repair ship be a useful peacetime force multiplier?AnswerQ&A
Yes, especially on prolonged deployments, but nearby shore facilities make the additional ship difficult to justify in a peacetime budget.
- 1:29:35QuestionDid the Royal Navy need a relief force after the Falklands fighting ended?AnswerQ&A
Yes. A group led by HMS Bristol went south to relieve ships that were wearing out and needed to return home while the postwar presence continued.
- 1:31:11QuestionWhat would a never-built Royal Navy SLBM depot ship have been used for?AnswerQ&A
It could have provided dispersed maintenance and support if British submarine bases were threatened, with possible use beyond its SSBN mission.
- 1:35:05Xanthus-class heavy fleet repair shipsNotable Point
The Xanthus class was a rare purpose-built heavy repair-ship class whose immense workshop capacity saw limited wartime use but later value in Korea.
- 1:42:57QuestionWhat did HMS Unicorn lack compared with a proper fleet carrier?AnswerQ&A
She was slower and optimized for support, but she retained many carrier capabilities; her auxiliary classification depended more on intended role and treaty law than on appearance.
- 1:47:52QuestionWhat did the inside of a repair ship look like?AnswerQ&A
It contained many machinery and craft workshops like those inside HMS Belfast, but repeated on the scale of an entire support ship.
- 1:49:19British defence spending and the NATO central frontNotable Point
The loss of CVA-01 is linked to a policy of seeking maximum diplomatic effect from limited defence spending by prioritizing NATO's central front.
- 1:53:29QuestionWhy did a forward aviation support ship need its own flight deck?AnswerQ&A
It allowed maintainers to test repaired aircraft and let serviceable or replacement aircraft fly directly back to operational carriers.
- 1:54:12QuestionWhat difference would three HMS Unicorn-class support ships have made in 1943?AnswerQ&A
They could have eased the carrier shortage by assigning a dedicated aircraft-repair and replacement ship to each armored fleet carrier.
- 1:56:26USS Vulcan and Japanese forward repairChapter
USS Vulcan's long service and Japan's Akashi demonstrate how forward repair capacity protected destroyer readiness and scarce experienced crews in Pacific operations.
- 1:59:39QuestionWould a modern version of HMS Unicorn be useful?AnswerQ&A
Yes, if the fleet operated enough aircraft to keep it useful; an LHD-like design would be the likely modern form.
- 1:59:58Modular replenishment reduces demand for repair shipsNotable Point
Modern replenishment ships can deliver modular replacement parts and materials to the workshops already aboard larger warships, reducing the demand for a separate repair hull.
- 2:03:55QuestionWhen did navies begin relying on purpose-built repair ships, and why were they uncommon in peacetime?AnswerQ&A
They became important mainly during the Second World War; in peacetime, onboard workshops, depot ships, and shore bases were usually cheaper substitutes.
- 2:08:08QuestionCould surviving Courageous-class carriers have been converted into aircraft repair ships?AnswerQ&A
Probably. They were larger and better suited than Furious, although their condition would determine whether conversion remained worthwhile.
- 2:10:04QuestionHow large was HMS Unicorn's operational fighter force?AnswerQ&A
A rough later estimate gives eighteen fighters plus eighteen strike aircraft, or about thirty-six fighters once types such as the Seafire could cover both roles.
- 2:10:45British repair versus American aircraft replacementNotable Point
American carrier logistics could emphasize a conveyor belt of replacement aircraft and island repair facilities, while British distance from industry encouraged more intensive repair close to the fleet.
- 2:14:01QuestionWhich Second World War naval aircraft were especially maintenance-heavy?AnswerQ&A
The Seafire was particularly demanding, with the Corsair also intensive; the Swordfish was simpler and the Hellcat was a practical aircraft to maintain.
- 2:15:11QuestionCould an earlier HMS Unicorn have accompanied Force Z?AnswerQ&A
Possibly. An undelayed Unicorn could have been available in early 1941 and might have supplied Force Z with fighter support.
- 2:18:08A Seafire's carrier adaptation under strainNotable Point
A photograph of a Seafire caught in a deck barrier illustrates how closely the naval fighter still resembled its minimally adapted Spitfire parent.
- 2:21:42What a multi-role support ship could replaceChapter
A common RFA support hull could cover carrier sustainment, Bay-class landing support, hospital work, and littoral-strike missions if its design accepts the tradeoffs between those roles.
- 2:23:20Why amphibious command still needs dedicated LHDsChapter
Replacing Albion and Bulwark requires naval-standard LHDs with protected command spaces, troop and vehicle capacity, and the ability to lead a task group close to shore.
- 2:29:33QuestionWould using one common hull for hospital and command roles blur the line between them?AnswerQ&A
Not if one ship is clearly assigned and marked for the hospital role rather than trying to perform both functions at once.
- 2:29:56QuestionWas a CAM Hurricane heavily modified for use at sea?AnswerQ&A
No. The only relevant change was fitting the aircraft to its launch carriage.
- 2:30:49QuestionHow many multi-role support ships would be needed for a credible fleet?AnswerQ&A
A pool around twelve could cover several support roles and keep multiple ships available through normal force-generation cycles.
- 2:34:47QuestionHow would a submarine tell that a multi-role support hull was operating as a hospital ship?AnswerQ&A
The ship should broadcast and display its protected status, with the submarine using visual confirmation if necessary; compliance by both sides remains essential.
- 2:38:13QuestionWhy did other navies not adopt Britain's forward aviation support-ship concept?AnswerQ&A
Britain's exceptionally long Pacific supply chain rewarded forward repair, while the United States could rely more heavily on mass production and a steady flow of replacement aircraft.
- 2:40:19The scale of logistics support at OkinawaNotable Point
The support force behind Okinawa included oilers, ammunition ships, cargo ships, hospital ships, repair ships, floating docks, and tugs alongside combatant formations.
- 2:43:43QuestionWhy not buy smaller corvettes or carriers to obtain more hulls?AnswerQ&A
Because governments may authorize a fixed number of ships rather than a fixed tonnage; smaller designs can therefore mean the same hull count with less capability.
- 2:48:15Modern depot ships for smaller crewsNotable Point
A depot ship becomes useful when small, automated crews lack the space or skills to repair themselves while operating far from home.
- 2:50:45QuestionWhere is the line between a corvette, a frigate, and a destroyer?AnswerQ&A
The boundaries are blurred, especially as armament grows, which supports a clearer capability-based rating system.
- 2:51:13A 48-escort Royal Navy force modelNotable Point
A personal force model assigns twelve ships to each of four escort classes, dividing global-presence work from six heavier carrier, amphibious, or surface-action groups.
- 2:55:21QuestionDid the US Navy know American prisoners of war were aboard ships it attacked?AnswerQ&A
No. Had commanders known, they would probably have tried to board the ships.
- 2:55:27QuestionWhat could HMS Belfast have contributed in the Falklands War?AnswerQ&A
In this counterfactual, she could have served as Michael Clapp's flagship and delivered heavy naval gunfire from her twelve 6-inch guns.
- 2:56:12QuestionDid submarine milk cows count as tenders?AnswerQ&A
To an extent: they carried some other supplies, but their primary role was fuel supply.
- 2:56:22Maintenance battalions and forward upkeepNotable Point
A modern depot concept could place dedicated maintenance personnel alongside deployed ships whose crews lack time for routine upkeep and post-damage repair.
- 2:59:53QuestionWhat was the British equivalent of the US Navy's Seabees?AnswerQ&A
The Mobile Naval Air Bases, or MONABs, were the closest British naval comparison.
- 3:05:03Why Norway mattered to the Atlantic warNotable Point
The loss of Norway is rated as especially damaging because control or even continued neutrality there would have made the later North Atlantic struggle much easier for Britain.
- 3:06:01QuestionCould USS Enterprise (CVN-65) have been used to test EMALS?AnswerQ&A
Physically yes, but adapting and operating her for the test would have been too expensive to attract political support.
- 3:09:13QuestionHad an intake cover caused the Mediterranean F-35 loss?AnswerQ&A
That was only an unconfirmed rumor in November 2021; the conspicuous cover and routine checks made the claim questionable, so the cause still required evidence.
- 3:10:56QuestionWould using two Pegasus engines have benefited the Fleet Air Arm?AnswerQ&A
Possibly. It could have been very useful if the new design retained the Pegasus engine's reliability.
- 3:12:28QuestionWhat did Britain spend money on before World War II instead of defence?AnswerQ&A
Education, local services, some health care, infrastructure, foreign policy, administration, and the costs of governing the empire all competed for funds.
- 3:13:02QuestionWhat if HMS Warspite or HMS Vanguard had been reactivated for the Falklands War?AnswerQ&A
Its 15-inch guns would have provided overwhelming naval gunfire support for the force around San Carlos Water.
- 3:16:45QuestionWhat unusually specialized auxiliary ship did the Royal Navy consider?AnswerQ&A
It considered a shower tender, but ultimately fitted showers aboard individual ships instead.
- 3:20:36QuestionWould 3D printing favor specialist repair ships or printers on individual warships?AnswerQ&A
It could support either model: central printers improve efficiency, while distributed printers improve resilience; complex items such as engines would still require conventional support.
- 3:25:52QuestionWould less naval aviation and more battleship construction lead to more Jutland-style battles?AnswerQ&A
Not necessarily. Geography and dispersed task groups would often produce smaller engagements more like the Falklands or Dogger Bank.
- 3:29:57QuestionHow specialized could a naval store ship become?AnswerQ&A
Very specialized, depending on its cargo and task, including whether stores needed to be kept cool.
- 3:30:36QuestionDid skilled-trade costs and competition from civilian repair firms help push the US Navy away from depot ships?AnswerQ&A
Yes. Those personnel pressures mattered even though the capability remained useful.