YDT-01-class diving support vessel

The YDT-01 class is a class of diving support vessel of the Japan Maritime Self-Defense Force (JMSDF).

JS YDT-03
Class overview
Name	YDT-01
Builders	Yokohama Yacht Company, Yokohama Maehata Shipbuilding, Nagasaki
Built	1999-2002
In commission	2000-present
Planned	6
Completed	6
Active	6
General characteristics
Type	Diving support vessel
Displacement	240 t (240 long tons) standard 260 t (260 long tons) full load
Length	37.5 m (123 ft 0 in)
Beam	6.8 m (22 ft 4 in)
Draft	2.1 m (6 ft 11 in)
Depth	3.7 m (12 ft 2 in)
Propulsion	2 × diesel electric engines 2 × shafts
Speed	14 kn (26 km/h; 16 mph)
Complement	33
Sensors & processing systems	AN/SPS-10 surface-search radar AN/UQS-1D sonar
Armament	1 × single Oerlikon 20mm gun

Development

Traditionally, an auxiliary vessel (YAS), which is a modified retired minesweeper, has been used to support the transportation and work of the Explosive Ordnance Corps (EOD). However, these boats are aging, and since they are modified boats, it has been pointed out that they are unreasonable in terms of placement and lack of equipment. For this reason, this model was planned as a purposefully newly designed ship.^[1]

Construction was approved as a new ship type in 1998, and the first and second ships were laid down on June 14, 1999.^[1][2]

Ships in the class

Name	Builders	Laid down	Commissioned	Home port
YDT 01	Yokohama Yacht Company, Yokohama	June 1999	24 March 2000	Maizuru
YDT 02				Ominato
YDT 03	Maehata Shipbuilding, Nagasaki	July 2000	24 March 2001	Yokosuka
YDT 04		April 2001	18 December 2001	Kure
YDT 05		April 2002	14 March 2003	Sasebo
YDT 06				Okinawa