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W-1 Class, Japanese Fast Minesweepers


Photograph of W-2, a W-1 class minesweeper

CombinedFleet.com. Fair use may apply.


Specifications:


Tonnage 807 tons standard displacement
Dimensions 250'2" by 26'6" by 7'6"
76.25m by 8.08m by 2.29m
Maximum speed       20 knots
Complement 91
Armament 2 4.7"/45 dual-purpose guns
2 depth charge throwers
Machinery
2-shaft geared turbine (4000 ihp)
3 Kampon boilers
Bunkerage
186 tons coal
Range
3000 nautical miles (5600 km) at 10 knots
Modifications
1944: minesweeping gear removed, armament 1 4.7", 5 25mm/60 AA guns, 36 depth charges


The W-1s were completed in 1923-25 in various naval yards. The ships were initially top heavy, but were ballasted and had their armament reduced following the Tomozuru Incident. Most were later assigned to escort duty.


Units in the Pacific:

W-1      

Singora Attack Force     
Sunk by aircraft 1945-8-10 at Yamada Bay

W-2

Kota Baharu Attack Force     
Sunk by friendly torpedoes 1942-3-1 at Bantam Bay

W-3

Singora Attack Force  

Torpedoed 1945-4-9 off Sendai by Parche

W-4

Singora Attack Force     



References

CombinedFleet.com (accessed 2012-2-10)

Jentschura, Jung, and Mickel (1977)

Materials of IJN (accessed 2010-1-22)

Worth (2001)


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