Asagiri-class Destroyer

The Asagiri-class destroyer were a class of general purpose destroyers built during the 1980s for service with the Japan Maritime Self-Defense Force.

This class of general purpose destroyer is an extended version of its predecessor Hatsuyuki-class destroyers, and is mainly tasked with ASW and ASUW. The Asagiri-class vessels feature several enhancements and/or improvements over the Hatusyuki-class, such as:


 * COGAG Propulsion System: Compared with the COGOG propulsion system of the Hatsuyuki-class, this class has the COGAG propulsion system with enhanced capacity. The COGAG propulsion system is composed of four Kawasaki-Rolls-Royce Spey SM1A gas turbines.
 * Advanced Sensor Suite: This class is equipped with the OPS-28 surface search radar. The OPS-28 is analogous to the American Target Acquisition System Mk.23 with the Track while scan capability. Later ships of this class introduced the OPS-24 air search 3D radar. The OPS-24 is the first shipboard active electronically scanned array radar in the world.
 * Full-Configuration Destroyer CDS: The earlier batch was equipped the OYQ-6 combat direction system (CDS). This system employed one AN/UYK-20 computer as the same as OYQ-5 tactical data processing system of the Hatsuyuki-class, but it can exchange tactical data via Link-11, which the OYQ-5 does not support. Later, all OYQ-6 systems were upgraded to the OYQ-7, integrated with OYQ-101 ASW Direction System. All ships of this class were later retrofitted with the terminal for the MOF system, the key operational C4I system of the JMSDF which uses the Superbird SHF-SATCOM.
 * Enlarged Aviation Facilities: The hangar is enlarged in order to accommodate two helicopters, but generally only one helicopter is used operationally.

Asagiri, Yugiri, and Amagiri were named after World War II destroyers. Amagiri 's World War II namesake rammed and sank PT-109. The Yamagiri and Asagiri have been converted into training vessels in 2005. In 2011, they were reconverted back into destroyers.

Specifications

 * Type: General Purpose Destroyer (Hull Designation Symbol DD)
 * Service Period: 1988-Present
 * Characteristics:
 * Length: 449 feet 6 inches (137.01 meters)
 * Beam: 47 feet 11 inches (14.61 meters)
 * Depth: 28 feet 10 inches (8.79 meters)
 * Draft: 14 feet 9 inches (4.5 meters)
 * Displacement: 3,500 tons standard, 4,900 tons hull load
 * Crew: 220
 * Propulsion: 4 x Kawasaki-Rolls Royce Spey SM1A gas turbines, 54,000 shp
 * Range: 8,030 nautical miles (14,872 kilometers) at 14 knots (25.96 km/h)
 * Speed: 30 knots (55.56 km/h)
 * Sensor Suite:
 * OPS-14C Air Search Radar - replaced by OPS-24 3D Air Search Radar
 * OPS-28C Surface Search Radar
 * OPS-20 Navigation Radar
 * FCS-2 Fire Control Radar
 * OQS-4A Hull Sonar
 * OQR-1 Towed Array Sonar
 * Countermeasures
 * NOLR-8 intercept
 * OLT-3 jammer
 * Mk.36 SRBOC x 2
 * AN/SLQ-25 Nixie torpedo countermeasures suite
 * Armament
 * 1 x Otobreda 76 mm Naval Gun
 * 2 x 20 mm Phalanx CIWS
 * 2 x 4-cannister Mk.141 Harpoon SSM Launchers
 * 1 x 8-cell Mk.29 Sea Sparrow SAM Launcher
 * 1 x 8-cell Mk.16 ASROC ASW Missile Launcher
 * 2 x HOS-302A 12.75" triple fire Torpedo Tubes
 * Aircraft Carried: 2 x Mitsubishi SH-60J Seahawk maritime helicopters

Unit Run

 * JS Asagiri (DD-151) - Converted to training vessel (TV-3516) on February 16, 2005, re-converted to DD-151 on March 2012
 * JS Yamagiri (DD-152) - Converted to training vessel (TV-3515) on March 18, 2004, re-converted to DD-152 on March 2011
 * JS Yuugiri (DD-153)
 * JS Amagiri (DD-154)
 * JS Hamagiri (DD-155)
 * JS Setogiri (DD-156)
 * JS Sawagiri (DD-157)
 * JS Umigiri (DD-158)