Ondo-class oiler

Class overview
Name:	Ondo-class oiler
Builders:	Kawasaki Shipbuilding Corporation Kure Naval Arsenal Yokosuka Naval Arsenal
Operators:	Imperial Japanese Navy
Preceded by:	Kamoi
Succeeded by:	Kazahaya
Cost:	2,250,000 JPY
Built:	1922–1924
In commission:	1923–1946
Planned:	5
Completed:	3
Cancelled:	2
Lost:	2
Retired:	1
General characteristics
Displacement:	15,400 long tons (15,647 t) standing
Length:	138.68 m (455 ft 0 in) Lpp
Beam:	17.68 m (58 ft 0 in)
Draught:	8.08 m (26 ft 6 in)
Propulsion:	Ondo 1 × three expansion stages reciprocating engine 4 × Kampon water tube boilers single shaft, 3,750 shp Hayatomo and Naruto 1 × three expansion stages reciprocating engine 4 × Miyahara model water tube boilers single shaft, 3,750 shp
Speed:	12 knots (14 mph; 22 km/h)
Capacity:	8,000 tons for oil
Complement:	157
Armament:	Ondo, 1923 2 × 140 mm (5.5 in) L/50 naval guns 2 × 76.2 mm (3.00 in) L/40 AA guns

The Ondo-class oilers (隠戸型給油艦, Ondo-gata kyūyukan) were a class of three oilers of the Imperial Japanese Navy (IJN), serving during the 1920s and World War II.

The Ondo class was initially planned in 1920 as the six of the Kamoi-class oilers under the Eight-eight fleet final plan. However, of the Kamoi-class oilers, only the Kamoi was completed, due to the conclusion and signing of the Washington Naval Treaty. The other five vessels were then re-planned to the Modified Notoro class.

Out of the five ships, one became the icebreaker Ōtomari, while the other become the food supply ship Mamiya. Therefore, only three ships were built as Modified Notoro-class (Ondo-class) oilers.

They devoted themselves to importing crude oil from North America and Southeast Asia. The crude oil which the Ondo class and the Notoro class carried to Japan was 388 sorties; 3,000,000 tons, until 1941.

They were not able to accompany heo fleet, because they were low speed. They were engaged in supply duties at naval bases.

Hayatomo

Naruto on 29 May 1932 at Yokosuka

(ja)

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