Aso-class patrol vessel

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Japan Coast Guard PL42 Dewa.JPG
Dewa (PL-42)
Class overview
Name: Aso class
Operators: Ensign of the Japanese Coast Guard.svg Japan Coast Guard
Preceded by: Ojika-class
Succeeded by: Hateruma-class
Built: 2002 – 2006
In commission: 2005 – Present
Completed: 3
Active: 3
General characteristics
Type: 1,000 ton-class PL (Patrol vessel, Large)
Displacement: 770[clarification needed]
Length: 79.0 m (259.2 ft)
Beam: 10.0 m (32.8 ft)
Depth: 6 m (20 ft)
Speed: 30+ knots
Complement: 30
Armament: One Bofors 40 mm L/70 gun with optical FCS

Aso class patrol vessel is a class of PL type patrol vessel of the Japan Coast Guard. PL stands for Patrol vessel Large, and the class name "Aso" is named after Mount Aso,the largest active volcano in Japan.

This class is one of the new patrol vessel classes to intercept spy boats of DPRK. These classes are called "高速高機能大型巡視船", High-speed, high-functionality patrol vessel, large. Having Bofors 40 mm L/70 autocannon with fire-control system, this class is safely able to deal with heavily armed spy boats of DPRK which intrude into Japanese waters. The hull of this class is bulletproof in case of close-range firefights.

In the back of the bridge's side,this class has display devices that can be used to instruct other ships to stop even at nighttime. And on the bridge superstructure, this class is equipped with the LIDAR system to acquire targets with high accuracy. At the same time, this system enables them to perform search and rescue missions more safely.

Ships in the class[edit]

PL41 Aso
Commissioned:2005 March
Home port:Fukuoka
PL42 Dewa
Commissioned:2006 April
Home port:Akita, Akita
PL43 Hakusan
Commissioned:2006 April
Home port:Kanazawa, Ishikawa

See also[edit]


  • "Ships of Japan Coast Guard". Ships of the World (Kaijinn-sha) (692): 51. July 2008. 
  • Shigehiro Sakamoto (July 2008). "60th Anniversary of JCG: For near future". Ships of the World (Kaijinn-sha) (692): 132–137. 
  • Yoshifumi Mayama (July 2008). "60th Anniversary of JCG: Technical history of its ship". Ships of the World (Kaijinn-sha) (692): 138–143.