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Pearl Harbor:  The Bombs of the Second Wave

On December 7, 1941, Japanese torpedoes and bombs devastated Hawaii’s warships and air fields. The “Weapons Wall” at Pacific Aviation Museum has full-size models of three of these weapons—the ones used in the first wave of the attack. The wall also shows the aircraft that carried different types of ordnance during the first wave.

This article goes beyond the information shown on the Weapons Wall, to look at the bombs used in the second wave. The Japanese Kates and Vals of the second wave delivered different types of bombs than they delivered in the first wave—including two types of bombs not used in the first wave. Table 1 summarizes basic data about the torpedoes and four types of bombs used during the attack, and about the aircraft that delivered each weapon during the two waves.

Table 1: Japanese Bombs and Torpedoes at Pearl Harbor

Weapon Weight First Wave Second Wave
Type 91 Model 2 torpedo 838 kg
205 kg...

Sikorsky SH-60B Antisubmarine Warfare ASW Helicopter

The newest addition to Pacific Aviation Museum’s collection is a Navy SH-60B Seahawk helicopter. The Sikorsky Seahawk is a navalized version of the Army’s UH-60 Blackhawk. The Army began using the Blackhawk in 1979. The Navy quickly saw the Blackhawk as a good foundation for replacing its SH-2 Sea Sprite, which was protecting individual ships such as frigates, destroyers, and cruisers, which often have to operate outside of the fleet’s protection umbrella. In effect, the Sea Sprite was a self-contained antisubmarine warfare (ASW) system. The 1960s-vintage Sea Sprite was too small and underpowered to support the Navy’s new LAMPS II avionics system. The Blackhawk was the ideal size for the new system, and most of its development cost had already occurred. The Navy called its Sea Sprite replacement the SH-60B, where the “S” stands for antisubmarine warfare. The Navy began using the Seahawk in 1984.

Although the AH-6B Seahawk is primarily an antisubmarine warfare aircraft, it has...

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