Video

Patreon 91: Flower class sloops: The most key ship of the 20th century?

Study Patreon 91: Flower class sloops: The most key ship of the 20th century?, a Dr. Alex Clarke video from 21 Dec 2023, with 59 time notes. Topics include Anti-Submarine Warfare, Conflict Management, Escort Warfare.

Date
Runtime3:52:16
Guide points59 time notes

Time notes

  1. 8:00
    How wartime escorts became peacetime presence ships

    Mass-produced Flower-class sloops outgrew their wartime purpose and became a model for persistent, affordable naval presence.

    Chapter
  2. 14:30
    Why the Royal Navy reused flower names

    Flower names supplied a large naming pool, ready-made ship badges, and an identity around which a newly assembled crew could unite.

    Chapter
  3. 22:05
    Fishery protection teaches presence and restraint

    Small patrol commands teach officers to deter illegal activity, manage escalation, and achieve results without using disproportionate force.

    Chapter
  4. 25:07
    The best-timed naval visit is continuous presence

    Regular, familiar naval presence can spot tension early and keep rivalry from becoming armed conflict.

    Chapter
  5. 35:07
    Fisher's efficiency reforms weakened routine presence

    Fisher's efficiency drive removed many older station ships whose numbers, local knowledge, and fleet backing had made routine British presence credible.

    Chapter
  6. 40:33
    Presence ships need diplomatic facilities alongside weapons

    A ship's flag and access to a larger fleet create influence, but hosting spaces determine whether its crew can turn a visit into useful engagement.

    Notable Point
  7. 43:57
    Why battlecruiser visits led back to light-cruiser numbers

    Fisher expected spectacular battlecruiser calls to sustain influence between visits, but the Royal Navy still needed large light-cruiser numbers for regular engagement.

    Chapter
  8. 51:33
    Frequent small visits compound naval influence

    A simple scoring example shows how repeated small-ship visits can retain more influence than one impressive annual appearance.

    Notable Point
  9. 58:07
    QuestionDid the Battle of Coronel show that the Royal Navy's older global-presence ships were a flawed system?Answer

    No. The defeat is attributed chiefly to dispersal and failed reinforcement. HMS Defence might have deterred von Spee, while an Invincible-class battlecruiser would likely have reversed the balance.

    Q&A
  10. 1:01:53
    Media magnifies visits but cannot replace them

    Publicity can extend the reach and duration of a port visit, but it works as a multiplier for physical engagement rather than a substitute for ships on station.

    Notable Point
  11. 1:03:00
    World War I exposed the need for purpose-built small escorts

    World War I found converted trawlers too small for every escort and minesweeping requirement, creating demand for stronger purpose-built small warships.

    Chapter
  12. 1:04:59
    QuestionIf the naval arms race had not occurred, would Britain's surviving pre-dreadnoughts have become presence ships?Answer

    A few probably would, with Lord Nelson and Agamemnon plausible distant-station ships, but not the whole older battle fleet.

    Q&A
  13. 1:05:23
    What navalized merchant construction actually meant

    The Flower hulls borrowed merchant practice for economy but retained naval strengthening where minesweeping and escort work demanded it.

    Notable Point
  14. 1:08:11
    Five Flower batches produced 120 wartime escorts

    Successive minesweeping and anti-submarine batches gave Britain and France 120 Flower-family sloops, about 100 of which survived the war and immediate aftermath.

    Chapter
  15. 1:11:38
    Judge a sloop by its mission, not first-rate status

    Flower-class armament was flexible but modest; effectiveness came from matching the ship to mines, submarines, escort support, and presence work.

    Chapter
  16. 1:16:36
    QuestionDid Flower-class sloops and other anti-submarine escorts use ramming tactics against submarines?Answer

    Yes. Ramming was part of anti-submarine doctrine and was attempted by dedicated escort vessels as well as by famous larger ships.

    Q&A
  17. 1:22:40
    Enterprise survived the postwar cruiser debate, Euphrates did not

    Treasury pressure shadowed HMS Enterprise's completion, while the sharper Royal Navy debate concerned the cancelled third E-class cruiser, HMS Euphrates.

    Notable Point
  18. 1:24:53
    Flower-class sloops as task-group security ships

    The sloop adds specialized protection against submarines and mines rather than acting as a fleet picket or principal surface fighter.

    Notable Point
  19. 1:28:30
    QuestionDid sloop deck guns fire on the upward roll, and how was the firing moment chosen?Answer

    The choice depended on range and aim point: the roll could add elevation for long shots or help point downward at close targets, while trained crews relied on the guns' rapid rate of fire.

    Q&A
  20. 1:32:34
    The World War I Flower pattern shaped later escorts

    The Flower sloops established a durable small-escort pattern later refined into interwar sloops, wartime corvettes, escort destroyers, and frigates.

    Chapter
  21. 1:35:12
    QuestionDid any World War I Flower-class sloops remain in service during World War II?Answer

    Yes. About two did, including HMS Foxglove, which survived severe 1940 bomb damage and continued in support duties rather than returning to front-line escort work.

    Q&A
  22. 1:38:54
    The modern HMS Enterprise left service in 2023

    A live correction notes that the Echo-class survey ship HMS Enterprise had decommissioned in March 2023, following sister HMS Echo in 2022.

    Notable Point
  23. 1:40:41
    HMS President preserves a Flower-class survivor

    The former HMS Saxifrage, later HMS President, is presented as the likely last surviving physical example of the World War I Flower-family sloops.

    Notable Point
  24. 1:42:36
    Bomb-hit location shaped small-warship survival

    A bomb amidships could destroy machinery spaces, while comparable hits near the ends of a sloop or destroyer left more structure available to contain damage.

    Notable Point
  25. 1:43:33
    HQS Wellington makes preserved sloop history tangible

    The white-hulled HQS Wellington offered a preserved small-warship setting where students could study naval design and service life directly.

    Notable Point
  26. 1:44:24
    Escort mass production demonstrated industrial intent

    Building and crewing roughly 120 escorts showed Germany that Britain could replace losses, protect trade, and mobilize maritime industry at scale.

    Chapter
  27. 1:50:03
    Interwar sloops helped build Dominion navies

    HMS Veronica shows how inexpensive station sloops extended British presence while helping Dominion navies such as New Zealand's build local capability.

    Chapter
  28. 1:54:20
    QuestionHow senior were the officers who usually commanded Flower-class sloops?Answer

    They were generally lieutenant commanders or commanders, making sloops valuable early independent-command appointments for future cruiser officers and warfare specialists.

    Q&A
  29. 1:56:10
    QuestionWhich famous officers came out of the Royal Navy's sloop service?Answer

    Frederic John Walker is the leading example, emerging from a sloop-based anti-submarine specialism before commanding Stork and Starling.

    Q&A
  30. 2:03:55
    QuestionHow many former naval officers went into diplomatic service, and why were they recruited?Answer

    A considerable number did because they already spoke relevant languages, understood overseas regions, and knew how to work with other officials.

    Q&A
  31. 2:04:13
    QuestionIf Britain had maintained and distributed sloop production through the interwar years, how would that have changed World War II?Answer

    A steady program could have supplied a large prewar escort force, reduced emergency construction, strengthened early convoy defense, and expanded the industrial and personnel base available for wartime growth.

    Q&A
  32. 2:08:47
    HMIS Pansy and the interwar sloop revival

    A reused World War I Flower hull and the renewed British building program show how interwar sloop capacity survived and then grew in batches.

    Chapter
  33. 2:12:08
    Eight sloops a year could reshape the early U-boat war

    A steady eight-ship annual program could reduce emergency escort construction and make early U-boat losses damage Germany's later training cadre.

    Chapter
  34. 2:17:40
    QuestionWould building many more interwar sloops have changed destroyer development?Answer

    Destroyers would develop much as they did, but a larger sloop program could accelerate dual-purpose guns and expand turbine capacity available to both classes in wartime.

    Q&A
  35. 2:18:53
    QuestionDoes the Perisher course remove the need for cheaper submarines as command-development platforms?Answer

    No. Perisher is an excellent selection course, but successful officers would still benefit from commanding an SSK before taking responsibility for an SSN.

    Q&A
  36. 2:20:41
    HMS Folkestone at the Singtao incident

    A sloop accompanied HMS Birmingham to recover SS Vincent de Paul, adding presence and tactical flexibility without making the force look needlessly escalatory.

    Chapter
  37. 2:34:53
    River-class OPVs as modern presence squadrons

    Modern patrol vessels fill the low-cost, persistent role once served by sloops, but useful coverage requires several ships at each important station.

    Chapter
  38. 2:36:37
    QuestionWhy did Royal Navy sloops lack torpedo armament?Answer

    Because they were optimized as adaptable low-speed escorts and presence ships; torpedoes and destroyer speed would spend resources on a surface-strike role outside their purpose.

    Q&A
  39. 2:43:22
    QuestionWhy not replace the River class's 30 mm gun with a close-in weapon system or otherwise up-gun the ships?Answer

    Because extra weapons make the ship costlier and more complex while encouraging it to be sent into threats meant for frigates or destroyers; modest sensors, electronic warfare, drones, and a 40 mm gun better fit the OPV mission.

    Q&A
  40. 2:50:35
    Sandown minehunters continued the minesweeping-sloop role

    Sandown-class minehunters are functional sloops because mine warfare had long been one of the type's defining missions.

    Notable Point
  41. 2:50:52
    Threat tiers keep patrol ships out of destroyer missions

    A layered fleet should send a River, Type 31, Type 26, or Type 45 according to the threat instead of making every patrol ship imitate a frigate.

    Notable Point
  42. 2:55:15
    River Batch 2 trades heavy weapons for endurance and people

    Speed, roughly month-long endurance, fast boats, a helicopter-capable deck, and space for up to 50 embarked personnel make Batch 2 Rivers useful for persistent security work.

    Notable Point
  43. 2:58:08
    QuestionHow would a modern uncrewed Flower-class support ship be configured, and could it carry drones?Answer

    A River-class-derived hull could retain a flight deck, basic maintenance accommodation, autonomous controls, limited guns and VLS, but drone handling would still need substantial automation or human intervention.

    Q&A
  44. 2:59:29
    Why 40 mm leaves room for better ammunition

    The extra volume inside a 40 mm shell makes advanced ammunition easier and more economical to develop than comparable 30 mm rounds.

    Notable Point
  45. 3:02:15
    A 57 mm gun changes the patrol-ship cost equation

    A 57 mm gun offers a real capability increase over 40 mm, but its larger cost jump makes an OPV look more like a cheap frigate without delivering Type 31 capability.

    Notable Point
  46. 3:06:26
    QuestionWhat gun caliber is too large for an offshore patrol vessel?Answer

    It depends on the navy: a 76 mm gun fits Thailand's fleet commonality and force structure, while 40 mm is the more proportionate British upgrade from 30 mm.

    Q&A
  47. 3:12:22
    Presence ships need austere, off-the-shelf systems

    An OPV gains more from standard, easily maintained equipment than from bespoke high technology that demands specialist support in distant ports.

    Notable Point
  48. 3:13:34
    QuestionWhy are so many NATO offshore patrol vessels armed with 20 mm guns?Answer

    Because 20 mm is cheap and often proportionate to the patrol vessel's size, operating area, and expected threats.

    Q&A
  49. 3:14:08
    Public access favours simple, securable ship systems

    Weapons and equipment on a diplomatic presence ship should be easy to secure, inspect, and restore when visitors come aboard.

    Notable Point
  50. 3:14:47
    StanFlex pays off only as a fleet-wide system

    Danish modularity makes the Knud Rasmussen-class patrol vessels a compelling modern sloop model, but another navy must fund modules, support, and common interfaces across more than one OPV class.

    Notable Point
  51. 3:18:22
    Retaining Type 23s beats converting Rivers for the frigate gap

    If Type 31s are late, extending suitable Type 23s preserves real frigate capability more effectively than taking River OPVs offline for complex upgrades.

    Notable Point
  52. 3:24:33
    Reserve ships protect a fleet against long-war attrition

    Small fleets are brittle when refits overrun or worn ships fail, making reserve hulls and low-end ships important to sustained readiness.

    Chapter
  53. 3:31:08
    Nuclear stalemate makes limited-war control more important

    If both superpowers know nuclear use means mutual loss, rivalry continues below that threshold and conventional escalation must be managed carefully.

    Notable Point
  54. 3:32:39
    QuestionCan a River-class patrol vessel receive supplies from a Chinook helicopter?Answer

    Merlin capability is clear, but possible Chinook testing on HMS Clyde is recalled without confirmation.

    Q&A
  55. 3:33:49
    Long wars expose vertical-launch replenishment limits

    Vertical-launch systems designed on the assumption that their magazines would not need reloading become a logistical constraint once a conflict lasts.

    Notable Point
  56. 3:35:37
    QuestionCould an enlarged River-class offshore patrol vessel be turned into a corvette?Answer

    Yes. BAE's Avenger proposal did so for the Type 31 competition, but it offered too little capability beyond the River family compared with the selected Arrowhead frigate design.

    Q&A
  57. 3:39:27
    More modest hulls improve force generation

    Twelve simpler ships can sustain more deployments and absorb refit failures better than six more powerful ships bought for the same budget.

    Chapter
  58. 3:44:58
    QuestionHow could Britain add submarine force multipliers around its SSNs and ballistic-missile boats?Answer

    It could add cheaper SSKs, or build two extra Dreadnought-family hulls configured as SSGNs with the potential to backfill the ballistic-missile role when required.

    Q&A
  59. 3:48:29
    Crew growth must precede faster shipbuilding

    Turning on the shipyard pipeline too quickly creates empty hulls unless recruitment and training expand early enough to provide crews when the ships commission.

    Notable Point