Aso (PL 41)
Class overview
NameAso class
BuildersMitsubishi Heavy Industries, Universal Shipbuilding Corporation
OperatorsJapan Japan Coast Guard
Preceded byOjika class
Succeeded byHateruma class
SubclassesTT-1500 design
Built2002–2006
In commission2005–present
Planned3
Completed3
Active3
Class overview
NameTT-1500 design
BuildersTBA
Operators Vietnam Coast Guard
Preceded bySouth Korea Han River-class vessel
CostUSD $398,430,000 for six vessels
BuiltJul. 2020 - Oct. 2026 (planned)
Planned6
On order6
Completed0
Active0
General characteristics (Aso class)
Type1,000 ton-class PL (Patrol vessel, Large)
Tonnage770 GT
Length79.0 m (259 ft 2 in)
Beam10.0 m (32 ft 10 in)
Depth6 m (19 ft 8 in)
Propulsion
Speed30+ knots
Complement30
ArmamentOne Bofors 40 mm L/70 gun with optical FCS
ArmourBallistic protection over certain areas
Aviation facilitiesOne helipad (TT-1500)
General characteristics (TT-1500)
TypeGeneral-purpose TT (tuần tra)-classification offshore patrol vessels
Displacement1,500 ton
Length79.0 m (259 ft 2 in)
Beam11.0 m (36 ft 1 in)
Height6.8 m (22 ft 4 in) (freeboard)
Draught3.3 m (10 ft 10 in)
Speed24 knots (44 km/h; 28 mph)
Range4,000 nautical miles (4,600 mi; 7,400 km)
Armament
Aviation facilitiesOne helipad
NotesCharacteristics extracted from the 2018 initial projection and likely become subjects to be changed

The 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 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.

Vietnamese variant

In 2020 there was signed an export deal between Japan and Vietnam over 6 vessel for the Vietnam Coast Guard (VCG), locally designated as the "TT-1500 patrol ship".[1][2]"TT" stands for "Tuần tra" means "Patrol", meanwhile the number "1500" stands for the class's displacement of 1500 tons. According to pieces of information shared by VCG, TT-1500 has a slightly bigger size than the original Aso-class, and it is also equipped with a helipad and the overall design is likely inspired from the successor designs such as the Kunigami-class patrol vessel.

The TT-1500 will have a maximum speed of 24 knots, considerably slower than the original Aso, however it is projected to have a better low-speed stability hence making it better for low-intensity patrol and search-and-rescue missions.[3] The delivery for all 6 ships is expected to be completed by October 2026.[4]

Ships in the class

Ships in the class
Pennant numberShip nameBuilderCommissionHomeport
Japan Japan Coast Guard (Aso-class)
PL 41AsoMitsubishi Heavy Industries15 March 2005Fukuoka
PL 42DewaUniversal Shipbuilding Corporation12 April 2006Akita
PL 43HakusanKanazawa
Vietnam Coast Guard (TT-1500)
CSB 8*** TBA

See also

References

  1. "Japan to build six patrol vessels for Vietnam's Coast Guard". 8 August 2020.
  2. "Vietnam Coast Guard". www.globalsecurity.org. Retrieved 22 July 2021.
  3. "[ẢNH] Cảnh sát biển Việt Nam có thêm lớp tàu tuần tra cỡ lớn hiện đại". Báo điện tử An ninh Thủ đô (in Vietnamese). 1 September 2018. Retrieved 18 November 2023.
  4. "Ex-Ante Evaluation (for Japanese ODA Loan)" (PDF). JICA.

Further reading

  • "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.
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