Video
Bruships 134: Imperial Japanese Navy Books
Study Bruships 134: Imperial Japanese Navy Books, a Dr. Alex Clarke video from 7 Jan 2024, with 81 time notes. Topics include Heavy Cruisers, Imperial Japanese Navy, Live Q&A.
Time notes
- 4:57QuestionWas Warspite's spotter aircraft involved in combat beyond directing the battleship's guns?AnswerQ&A
Yes. Its Swordfish probably shot down a Bf 109 in Norway and sank a submarine at Narvik, though some other reported exploits remain unconfirmed.
- 5:57QuestionWould the United States and Japan sign a treaty if Britain redesigned the N3 and G3 for 28 and 32 knots with all-forward guns?AnswerQ&A
The United States would have a strong incentive to sign, while Japan would face difficult choices because several of its competing designs already had problems.
- 7:54QuestionWhat was the idea behind converting Kitakami and Oi into torpedo cruisers?AnswerQ&A
They were intended to mass long-range torpedoes for night attacks, but the concept relied on an enemy following a predictable course and was vulnerable to zigzagging and radar.
- 14:04QuestionWhat makes early helicopters an interesting subject for naval aviation?AnswerQ&A
Their promise depends on matching the aircraft to a suitable platform and mission, and Whirlwind-type helicopters could serve varied roles including troop transport.
- 18:49QuestionWithout the naval treaties, who would want Courageous and Glorious as battlecruisers or coastal-defence ships?AnswerQ&A
Probably nobody: their limited gunnery arrangement, specialized shallow draft, and heavy maintenance demands made scrapping more likely than sale.
- 19:23QuestionWhat would the treaty navies build if each received Britain's allowance for two new battleships?AnswerQ&A
Most would build 16-inch battleships, while Britain would likely demand four ships and might divide them between slower heavily protected and faster designs.
- 27:01QuestionWould Britain consider a 30,000-ton purpose-built carrier after Argus, Furious, and Eagle without treaty limits?AnswerQ&A
Yes, although the most plausible starting point is one of the roughly 28,000-ton designs Britain had already studied.
- 29:19QuestionIs an internal armor belt preferable to the external belt used by the King George V class?AnswerQ&A
Internal belts may be marginally stronger initially, but an external belt is much easier to repair after cumulative shell damage.
- 31:33QuestionWhy did US cruisers not maneuver defensively while British battleships and cruisers zigzagged?AnswerQ&A
US doctrine relied on destroyers to detect submarines, while the Royal Navy zigzagged habitually before detection and therefore disrupted Japanese long-range torpedo solutions.
- 35:43QuestionHow fast could a 35,000-ton Nelson be with a 12-inch belt, 4.7-inch secondary guns, and no torpedoes?AnswerQ&A
A four-shaft design could probably make at least 28 knots because the lighter protection, secondary battery, and deleted torpedoes free space and weight for machinery.
- 36:32QuestionWhat happens if prewar Royal Navy admirals seek funds from the US Congress while US Navy admirals use the British system?AnswerQ&A
US officers would welcome the funding opportunity, while British officers would resist locking requirements in five years ahead of a rapidly changing naval race.
- 38:08QuestionWas Bismarck zigzagging only to lose the shadowing cruisers, or might the Germans also have feared Royal Navy submarines?AnswerQ&A
They could have feared a submarine even though one in the mid-Atlantic was unlikely, because Bismarck could not know the actual British deployment.
- 38:50QuestionWhat if Queen Mary survived the hit at Jutland with only the turret burning?AnswerQ&A
She would likely fall out of line and possibly return home, where evidence from the damage could influence later British ship design and procedures.
- 39:17Who owns British defence spending decisionsNotable Point
A discussion of rumored ship cuts distinguishes departmental advice from the ministers who authorize policy, procurement, and funding.
- 47:33Why a British military coup is institutionally unlikelyNotable Point
Citizenship, voting rights, allegiance to the monarch, divided unit loyalties, and the burden of governing all work against a unified British military takeover.
- 50:04QuestionWhat would it take for an aircraft carrier to have two angled flight decks?AnswerQ&A
It would introduce hazardous emergency flight paths and major expense, with little advantage over building two carriers.
- 53:59QuestionHow would the West German Navy use a fully intact G3 that appeared in the 1960s, and should the design count as a battleship?AnswerQ&A
It would probably serve as an intimidating Baltic presence, but the G3 remains a battlecruiser when compared with the battleships of its own generation.
- 55:36QuestionIs the Royal Navy's main personnel problem recruitment or retention?AnswerQ&A
Both interact: a smaller fleet restricts advancement, while better housing, education, benefits, and reserve flexibility can make naval careers more sustainable.
- 58:35QuestionHow would US treaty calculations change if Britain entered the negotiations with many more heavily armed capital ships?AnswerQ&A
The United States would respond in construction, but the greater gun and displacement scale would raise the treaty ceiling and impose especially severe costs on Germany.
- 1:01:47QuestionWould the treaty cruiser limit have fallen to about 8,000 tons and 6-inch guns if Hawkins had not been built?AnswerQ&A
Possibly: Hawkins gave the United States the 7.5-inch, large-cruiser precedent that it rounded up to the 8-inch, 10,000-ton standard.
- 1:02:22QuestionWhat if Britain invested more in seaplane and aircraft carriers before World War I?AnswerQ&A
If the work produced practical Hermes-style carriers and aircraft, Britain would begin the war with a more capable strike force that could disrupt German fleet deployment.
- 1:06:42QuestionHow would a four-ship Tiger class affect Dogger Bank and Jutland?AnswerQ&A
The extra squadron would greatly strengthen British firepower, likely increase German losses, and introduce another senior commander into Beatty's force.
- 1:12:21QuestionWould 30,000-ton Courageous-class ships still be converted into aircraft carriers?AnswerQ&A
Possibly, but ships with six or more heavy guns would be useful enough that the Royal Navy would be more likely to retain them as fast capital ships.
- 1:17:01QuestionWhat changes if the Topaze-class protected cruisers are built with steam turbines from the start?AnswerQ&A
Later British cruisers would adopt turbines earlier, pulling boiler-pressure and machinery development forward by about a decade.
- 1:19:35QuestionWhat would the Royal Navy use for carriers if larger Courageous-class ships remained gunships?AnswerQ&A
It would build carriers from scratch or turn to older battlecruisers and incomplete Admiral-class hulls, with G3-related conversions another possibility.
- 1:22:09QuestionWhy did prewar German boiler design rely on British coal if war with Britain was possible?AnswerQ&A
German leaders believed naval strength would deter Britain from fighting, so the fleet accepted a fuel dependency that became dangerous when deterrence failed.
- 1:22:29QuestionWhat would happen if Tribal-class destroyers captured Tirpitz and brought her back to Britain?AnswerQ&A
The crews would receive prize money, Britain would study the ship, and the most practical disposition might be transfer to the Soviet Union rather than Royal Navy service.
- 1:23:42QuestionWould Scharnhorst and Bismarck receive a German 5-inch dual-purpose gun if it were available before World War II?AnswerQ&A
They should replace much of the separate secondary and anti-aircraft battery with it, but German committee decisions make that outcome unlikely.
- 1:26:16QuestionWhat happens if Japan attacks British and French Far Eastern possessions in September 1939?AnswerQ&A
The attack likely brings the United States into the war immediately, while Germany's tiny operational surface fleet does little to stop Britain sending forces east unless Italy also enters.
- 1:31:15British armoured doctrine before the North African campaignNotable Point
North Africa gave British armoured forces confidence and forced implementation, but many of the ideas had already been exercised during the 1920s and 1930s.
- 1:32:31QuestionHow useful were the Russian warships captured by Japan?AnswerQ&A
They were valuable as fleet-expansion and development tools but were not especially strong front-line warships.
- 1:32:54QuestionIs there a definite number of survivors from Queen Mary?AnswerQ&A
Twenty is the best total in this account: eighteen were picked up by the British and two by the Germans, while smaller figures often count only one rescue ship's survivors.
- 1:34:03QuestionWhat changes if the Channel Islands are located in the middle of the English Channel?AnswerQ&A
Britain would be much less willing to abandon them and would defend and evacuate them more carefully because control of a central position would directly affect the Channel.
- 1:35:16QuestionHow and why was the Admiralty staff created in 1912?AnswerQ&A
The Admiralty formalized and connected existing specialist departments, adding a permanent operations structure for the larger and more complex fleet it expected to fight.
- 1:36:17QuestionWhat could replace 50 Lockheed P2V Neptunes until additional Shackletons arrived?AnswerQ&A
The RAF would keep Lancasters and Wellingtons in service until enough Shackletons were available.
- 1:36:38The Royal Navy and the Sino-Japanese Incident, 1937-41Chapter
A book review explores Britain's naval position in China as Japanese pressure on shipping and trade collided with commitments in Europe and the Mediterranean.
- 1:48:57When giant weapons are status displaysNotable Point
Monumental swords and other impractical weapons may be ceremonial displays or trophies rather than evidence of battlefield use.
- 1:54:21How Victorian assumptions misread armed womenNotable Point
Some Victorian archaeologists treated armour and weapons as proof of a male burial even when skeletal evidence pointed to a woman.
- 1:55:56QuestionHow would Cold War US submarine operations change if every Tench, Balao, and Gato-class boat were modernized?AnswerQ&A
The Navy would have many more usable submarines than it needed day to day, so a large reserve or in-ordinary system would become central to managing them.
- 1:57:35Why Britain and the United States could answer a gun raceNotable Point
Bethlehem Steel, Vickers, Armstrong, and Skoda formed the heavy naval-manufacturing elite, while Germany faced a costly choice between fewer advanced ships and more ships with weaker batteries.
- 2:07:08QuestionHow much trouble would a much more heavily armed Royal Navy cause the High Seas Fleet?AnswerQ&A
It would force Germany into a costly choice between fewer more powerful ships and a larger but increasingly outgunned fleet, while intensifying the navy's budget fight with the army.
- 2:08:31QuestionWould replacing Hawkins's single 7.5-inch guns with six twin turrets better prepare Britain for the next generation of cruisers?AnswerQ&A
It would create a more powerful turreted cruiser, but the mounts and supporting structure would probably raise displacement to around 12,000 tons.
- 2:13:56QuestionWhere did American steel production bottleneck when shipbuilding demand surged?AnswerQ&A
At the specialized foundries needed for armor-grade and other high-quality naval steel, because they take longest to establish and are costly to retain.
- 2:15:32QuestionWhen was the earliest that a turbine-powered armored cruiser could have been built?AnswerQ&A
An order was technically feasible around 1902, with a ship plausibly entering service in about 1904.
- 2:16:59Vickers as an integrated naval-industrial systemNotable Point
Vickers combined global-scale manufacturing with housing, hospitals, food, and local services designed to retain generations of skilled workers near expensive machinery.
- 2:17:38QuestionWould it be better to divert the British triple 4-inch mount to coastal defence?AnswerQ&A
Only if the naval mount could not be made to work. The preferred option was to repair it as a dual-purpose gun and perhaps develop it toward 4.5 or 4.7 inches.
- 2:20:34QuestionDid the Washington treaty require navies to convert ships into carriers rather than build new ones?AnswerQ&A
No. Conversion was permitted, but navies could also build new carriers and Britain did not even use conversions to fill its entire carrier allowance.
- 2:21:40QuestionWas a 6-inch dual-purpose gun being considered as early as the 1920s?AnswerQ&A
Yes. It was an original idea for the Nelson class, but it was not viable, leaving the high-angle secondary mountings as evidence of the requirement.
- 2:27:06QuestionWere the US and Japanese navies designing to refight World War I while the Royal Navy prepared for future warfare?AnswerQ&A
Partly, but the deeper difference was strategic: the United States and Japan focused on each other in the Pacific, while Britain had to cover several theaters and missions simultaneously.
- 2:28:11QuestionHow quickly could Hood's damage-control crews have responded to the boat-deck ammunition fire, and what would a surviving rebuild change?AnswerQ&A
The evidence is insufficient to judge the crew's response, while any later redesign would depend on the fire's actual path rather than simply removing the boats.
- 2:30:55QuestionWere the Warrior-class armoured cruisers effectively dreadnought armoured cruisers?AnswerQ&A
No. They helped develop the later pattern, but they predated the type and lacked capital-ship-calibre armament.
- 2:31:19QuestionHow might World War II change if a Panamax-scale St. Lawrence Seaway were completed by 1930?AnswerQ&A
It would improve inland access, industrial dispersal, and transport efficiency, producing many small gains whose combined wartime effect would be substantial but hard to isolate.
- 2:32:19QuestionWould a large battery of twin 4-inch guns and more Oerlikons have made Repulse fare better?AnswerQ&A
It would help, but Repulse also needed many more pom-poms and a balanced layered battery comparable to a thorough modern reconstruction.
- 2:34:09QuestionWhat if Britain built only new carriers after the Washington treaty instead of converting ships?AnswerQ&A
It could do so, but post-treaty ships would lock up carrier tonnage for years, while the older experimental fleet gave Britain more freedom to replace designs as it learned.
- 2:35:00QuestionWhat fleet would you build for Canada from 1928 with abundant resources and a million tons available?AnswerQ&A
Start with sloops, then build balanced two-ocean forces of carriers, battleships, cruisers, destroyers, and escorts as Canadian infrastructure and manpower expand.
- 2:36:44QuestionWhy did armored cruisers not suffer the same reputational collapse as battlecruisers after two blew up at Jutland?AnswerQ&A
They were already obsolete and their reputation had already collapsed after Aboukir, Cressy, and Hogue were lost together in 1914.
- 2:37:08QuestionWhat changes on D-Day if half the small landing craft are replaced by LVT-2s?AnswerQ&A
The assault force becomes more mobile inland and gains useful amphibious vehicles for later crossings, but it sacrifices conventional landing-craft capacity needed to sustain the beaches.
- 2:38:56QuestionHow long would the Home Fleet need to raise steam and leave harbor?AnswerQ&A
It depends on its ordered readiness state: a ship with a boiler lit might need about six hours, while units held at one or three hours' notice can depart much sooner.
- 2:41:40QuestionHow many 1941 Admiral-class heavy cruisers would the Royal Navy build?AnswerQ&A
Probably six to eight if they were needed quickly against the Italian and Japanese fleets, although more urgent programs could still take priority.
- 2:42:31QuestionWhy were Lexington and Saratoga given 8-inch guns, and what could replace them?AnswerQ&A
The guns conserved perceived cruiser firepower, but separate cruisers were the better answer; removing the turrets would improve stability and free space for aircraft, stores, and 5-inch guns.
- 2:46:52QuestionWhat changes if Britain receives workable LVT and DUKW designs in 1938?AnswerQ&A
The Army and Navy would probably develop them, potentially making amphibious vehicles available for commando operations during the Norwegian campaign.
- 2:50:38The Rise and Fall of the Imperial Japanese Naval Air ServiceChapter
The second featured book traces Japanese naval aviation as an institution, using aircraft development, foreign evaluation, carrier air groups, and personnel networks to explain its rise and decline.
- 3:00:27QuestionWhy did the Royal Navy use T-class ocean-going submarines in shallow Pacific waters after Mediterranean experience?AnswerQ&A
Pacific shallow areas often had deep water nearby for concealment and escape, whereas Mediterranean boats could remain trapped in shallow conditions across the theater.
- 3:02:00QuestionWas the Omaha class built as a response to Britain's C-class and Danae-class cruisers?AnswerQ&A
No. The stated explanation is that the US Navy needed light cruisers, without treating one British class as the program's direct cause.
- 3:04:12QuestionWould the United States have been better off accepting a British cruiser limit of 15,000 tons and 9.2-inch guns?AnswerQ&A
Possibly, but Britain and Japan would benefit too, and Japan's industrial capacity would determine whether it could exploit the larger design in equal numbers.
- 3:06:18QuestionWhy did British aircraft carriers use stacked hangars instead of one long open hangar?AnswerQ&A
The enclosed stacked arrangement protected aircraft and workshops from North Sea conditions and let heavy maintenance continue without blocking the main hangar.
- 3:08:29QuestionHow would a forty-ship County-class program change treaty limits and Axis naval strategy?AnswerQ&A
It would raise cruiser allowances, give Britain denser escort and hunting groups, make German raiding much harder, and force an already infeasible Plan Z to grow further.
- 3:11:35QuestionHave surface ships used devices similar to submarine dive planes to improve stability?AnswerQ&A
Yes. Some ships use deployable control surfaces that project into the water for stability and retract toward the hull when not needed.
- 3:12:02QuestionWould Australia build its own Hawkins-style or unique heavy cruiser instead of buying County-class ships?AnswerQ&A
No: without the necessary cruiser-building infrastructure, Australia would adopt the British design already supported by yards, weapons production, and skilled labor.
- 3:15:13QuestionHow would naval shipbuilding develop if World War I never happened?AnswerQ&A
Germany would lose the numerical race, but a continuing qualitative contest among Britain, the United States, Japan, Italy, and France would drive larger and more powerful designs.
- 3:18:00Why Long Beach was the US Navy's last purpose-built cruiserNotable Point
A classification dispute distinguishes Long Beach's cruiser design lineage from later nuclear ships developed from destroyer-leader or frigate specifications.
- 3:21:52When an amphibious ship loses the spaces that make it usefulNotable Point
British landing platform docks illustrate how committee-driven cuts can remove hangars, hospitals, and gyms that support the ship's actual expeditionary mission.
- 3:28:13QuestionCould 28-knot Queen Elizabeth-class battleships put Warspite or a sister at Denmark Strait?AnswerQ&A
Yes. Their speed and likely modernization would greatly enlarge Britain's fast-battleship pool and could add another battleship to the force facing Bismarck.
- 3:31:27QuestionIs there a standard draught ratio comparable to length-to-beam, and how has it changed over time?AnswerQ&A
Not as a simple universal rule: deeper draught trades greater resistance against stability and other design advantages.
- 3:42:25QuestionWhere was Haida's extra torpedo storage?AnswerQ&A
Lashing points on the deck indicate that spare torpedoes could be secured in exposed deck positions rather than an enclosed reload room.
- 3:44:27QuestionHow would Tribal-class destroyers change the fighting at Narvik?AnswerQ&A
They could inflict severe losses during the invasion, and a full Tribal flotilla in the first British battle might destroy the German destroyer force.
- 3:46:03QuestionHow do towing tanks test a ship model's turning ability?AnswerQ&A
The model is mounted on a powered rig that turns it at a scale-correct rate while its behavior is observed in the tank.
- 3:47:30QuestionHow large a French fleet would be needed to counter a 198-ship German Plan Z force?AnswerQ&A
France would want a force comparable to Germany and Italy combined but could not obtain it, so the Royal Navy would have to provide most of the balance.
- 3:49:07QuestionHow would the Iowa class change if it carried three quadruple main-gun turrets?AnswerQ&A
The ship would need more beam or length, but Panama Canal width and dry-dock length would make either solution difficult.
- 3:49:41QuestionWhat happens if France and Italy leave the naval treaty system over their incompatible requirements?AnswerQ&A
Britain would invoke escalation to meet the Italian fleet, and that change would let the United States and Japan expand as the wider treaty system broke down.
- 3:50:50QuestionDid wartime armored-cruiser losses cause the Royal Navy to abandon the type?AnswerQ&A
No. Treaty limits prevented a successor even though battlecruisers were too large and ordinary cruisers too small to fill the old armored-cruiser role completely.