The Triumph of Armour: British Doctrine and Kamikaze Defence in the 1945 Pacific War

On 8 May 1945, while Europe celebrated the unconditional surrender of Nazi Germany with the euphoria of ‘Victory in Europe Day’, the strategic centre of gravity had dramatically shifted to the Far East. For Royal Navy personnel, this date marked not the end of a victory, but the beginning of the bloodiest test for the British Pacific Fleet (BPF - Task Force 57), the largest naval force assembled since the Nelson era. Code-named the ‘Forgotten Fleet’ in the history books, this force was a strategic ‘political wedge’ devised by Winston Churchill and his staff.

Given the structure of the Pacific theatre under American operational supremacy, the raison d'être of the British Pacific Fleet was more about post-war geopolitical balances than military necessity. Churchill considered it essential for Britain to be a ‘key player’ at the table of Japan's final surrender in order to preserve its colonial legacy and prestige in the Asia-Pacific. However, this political objective left British sailors facing a psychological attrition threshold that went far beyond conventional warfare in Europe, reaching saturation point and being described as ‘otherworldly’: the kamikaze attacks!

The HMS Unicorn featured on the cover is a hybrid-designed aircraft repair and light aircraft carrier that joined the Royal Navy inventory in 1939.

Structural Defence: The Strategic Superiority of Armoured Aircraft Carriers

The Royal Navy relied on a fundamental design philosophy when deploying its ‘Illustrious Class’ aircraft carriers to the Pacific: survivability. While American aircraft carriers utilised wooden (teak) decks and open hangar structures for greater aircraft capacity, British ships were armoured in a ‘shoebox’ form. Three-inch steel flight decks and 4.5-inch armoured hangar walls turned these ships into floating fortresses against suicide attacks. To prevent capacity loss, ships like the Indefatigable adopted a ‘double hangar’ design to increase operational flexibility.

The price of this structural strength was a halving of aircraft capacity compared to American ships. To compensate for this shortfall, some aircraft were parked exposed on the deck (deck parks), a necessary tactical compromise between survivability and firepower.

The image below shows a Supermarine Seafire aircraft landing on an aircraft carrier. Image Source: Auckland Libraries Heritage Collections

In the image above, a Supermarine Seafire aircraft can be seen crashing during landing on the aircraft carrier HMS Indefatigable, its landing gear collapsing.

By 1945, approximately half of the Royal Navy's pilots had been trained in America, leading to American-made aircraft (Corsair, Avenger, Hellcat) becoming predominant in the fleets.

Operational Notes:

- Allies assigned male names to fighter aircraft and female names to bomber aircraft to make them easier to identify.

- Towards the end of the war, the Japanese resorted to kamikaze tactics instead of conventional attacks due to technical limitations and the loss of experienced pilots.

- Most of these aircraft caused less permanent damage thanks to the armoured decks of British aircraft carriers (compared to American ships).

Detection and Intervention Difficulties: Radar and Early Warning Crisis

Radar operations in the Pacific were in a constant state of ‘operational crisis’ due to technical and geographical obstacles. The low-altitude infiltration tactics employed by Japanese Mitsubishi Zero (Zeke) pilots, flying just 50 feet (15.24 metres) above the sea, left the radar systems of the era blind. This situation meant that, on the battlefield, with a detection limit of 28 miles, the Combat Air Patrol (CAP) had only 4.8 minutes to react to an attack group approaching at 350 mph.

Operational Detection Obstacles:

-Flash Red Crisis: The limited range of the radar reduced the time between signal and intervention to a critical level (less than 5 minutes), causing a high-tension cycle known as the ‘jitter effect’ among personnel.

-Low Altitude Complexity: Enemy tracks, defined as ‘bogies,’ slipping below radar waves at low altitudes narrowed the intervention angle of defence batteries.

-System Limitations: Low-altitude infiltrations made it impossible to vector CAP aircraft in time, leaving air defence dependent on the ships' own self-defence batteries.

Air Interdiction Force: Seafire and Corsair Operations

The ‘Flyboys’ generation within the BPF represented a hybrid culture combining traditional naval discipline with American technical training (Towers Scheme). The ‘Americanisation’ of these pilots (chewing gum, use of American slang) provided a strategic advantage by increasing operational interoperability with the US Fifth Fleet.

Aircraft Performance Analysis:

-Seafire (Naval Spitfire): While the agility of the Merlin engine was vital in Kamikaze defence, the narrow landing gear issue reflected in the ‘A25 Damage Reports’ led to Seafires being lost more often in deck accidents (attrition-by-accident) than enemy fire.

-Corsair (‘Whistling Death’): With 2,000 horsepower, it was a true ‘Kamikaze Hunter’. The ‘continuous turning approach’ technique developed by Mike Tritton solved the field of view disadvantage caused by the aircraft's long nose, making this platform the BPF's main striking force.

At the tactical level, ‘flat-hatting’ (low-level flying and aerobatics), seen as an indiscipline during peacetime, became a vital muscle memory in the Pacific. While hunting low-flying Kamikazes, this ‘dangerous’ flying habit is an unwanted tactical evolution that increases pilots' confidence in low-altitude combat.

-Avenger: Its structure, as comfortable as the ‘House of Lords’ (Lord of the Manor) of the era, and details such as the urine receptacle inside increased the endurance of personnel during long operations.

Operational Crisis Analysis: 9 May 1945 Case Study

The 9 May 1945 attack should be examined in military literature as an ‘Integrated Air-Sea Defence Failure Analysis’. The infiltration of five Japanese aircraft through the radar network into the centre of the fleet proved that the defence envelope had reached saturation point.

9 May Damage and Casualty Summary:

- HMS Victorious: Shaken by two separate suicide attacks; however, it managed to remain operational thanks to its armoured deck.

- HMS Formidable: A Zeke approaching from astern struck the ship despite heavy barrage. At this point, the perception of a ‘safe haven’ provided by the armoured structure was the only factor mitigating the psychological devastation experienced by pilots returning to their ships.

- The George Hinkins Incident: Petty Officer Hinkins' death at the eight-barrelled pom-pom battery located at the very edge of the flight deck documents the vulnerability to open defence risks faced by anti-aircraft crews, even on armoured ships. Hinkins' body remained fixed at the gun controls, symbolising the crew's ‘duty to the last’ discipline rather than the physical horror of the attack.

Strategic Implications and Historical Legacy

The 1945 Pacific operations played a catalytic role in the Royal Navy's transition to modern naval aviation doctrine. The British Pacific Fleet (BPF) not only played a supporting role but also provided absolute lessons on the future of aircraft carrier-centred warfare.

Strategic and Tactical Implications:

1. Air Defence Necessity: The kamikaze threat highlighted the importance of ‘deflection shooting’ and fully integrated radar-CAP networks.
2. Engineering Triumph: British armoured decks ensured ships remained operational within minutes after suicide attacks, providing survivability superiority over the American ‘wooden deck’ doctrine.
3. Doctrinal and Cultural Revolution: The prejudice that ‘sailors don't fly’ was completely shattered by the experience of 1945; aviation ceased to be a subsidiary branch of the navy and became its main operational backbone.
4. Legacy of Interoperability: The combination of American technical training and British discipline, which began with the Towers Scheme, is the first successful prototype of modern NATO standards and operational compatibility between allies.

Consequently, the British Pacific Fleet, embarking on a journey born of political necessity in an operational theatre dominated by the American Navy, completed its mission as an indispensable strategic pillar on the road to Japan's surrender, through tactical resilience and engineering superiority.

References

1) https://www.historyonthenet.com/british-pacific-fleet/

2) https://www.royalnavyresearcharchive.org.uk/SQUADRONS/887_Squadron.htm

3) Iredale, Will. The Kamikaze Hunters: Fighting for the Pacific, 1945. New York: Pegasus Books, 2016