The Pacific War Online Encyclopedia

Tonnage	7700 tons standard displacement
Dimensions	607'6" by 57'8" by 18'7" 185.17m by 17.58m by 5.66m
Maximum speed	32 knots
Complement	680
Aircraft	2 seaplanes 1 Kure Type 2 Model 5 catapult
Armament	3x2 8"/50 guns 4x1 4.7"/45 dual-purpose guns 4x2 25mm/60 AA guns 2x2 13mm/76 machine guns 2x4 Long Lance torpedo tubes (1 reload)
Protection	1300 tons 3" (76 mm) NVNC machinery belt inclined 9 degrees 1.4" (35 mm) NVNC middle deck 1.9" (48mm) HT upper deck 1.5" (38mm) NVNC uptakes 2" (51 mm) side/1.4" (35mm) overhead NVNC magazines 0.5" to 1" (13mm to 25mm) HT plates around steering room 1" (25mm) NVNC turret 1.4" (36mm) conning tower Large-type torpedo bulges
Machinery	4-shaft geared turbines (102000 shp) 12 Kanpon boilers
Bunkerage	2040 tons fuel oil
Range	8223 nautical miles (15,229 km) at 14 knots
Modifications	1943-2: Replaced one 8" turret and 13mm guns with 2x3 25mm guns and 4 depth charge racks (12 depth charges). 1943-11: Restored the 8" turret. Added 1x3 and 2x2 25mm guns and Type 21 radar. 1944-7: Added 4x3, 15x1 25mm guns and Type 22 radar. 1945-3: Added 4x2 25mm guns and increased depth charge loadout.

The Aobas were completed in 1927 and incorporated a number of lessons learned from the preceding Furutakas, such as the desirability of twin main gun turrets. However, these proved too heavy for the hull, which had to be reconstructed to take the weight. The Furutakas were later modernized to very closely resemble the Aobas, which were themselves modernized in 1938-1940.