Japanese patrol vessel Mizuho (PLH-41)

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Mizuho at Port of Naha
Class overview
Name	Mizuho-class patrol vessel
Operators	Japan Coast Guard
Preceded by	Mizuho class
Succeeded by	Shunkō class
Completed	1
Active	1
Laid up	1
History
Name	Mizuho
Ordered	2015
Builder	Mitsubishi Heavy Industries Shimonoseki Shipyard
Launched	November 9, 2018
Commissioned	August 22, 2019
Identification	IMO number: 9820752 MMSI number: 431001410 Callsign: 7KEA Pennant number PLH-41
Status	Active
General characteristics
Tonnage	6,000 GT
Length	134 m (439 ft 8 in)
Beam	15.8 m (51 ft 10 in)
Propulsion	2 × shafts 4 × diesel engines
Speed	25 knots (46 km/h; 29 mph)
Armament	1 × Bofors 40 mm gun 1 × JM61 20 mm gun
Aircraft carried	2 × Bell 412 helicopters

The Japanese patrol boat Mizuho is a PLH type patrol vessels of the Japan Coast Guard. She is only ship in her class: the construction of a second ship was planned originally, but has not been achieved as of 2020 due to the start of construction of the Shunkō class and Reimei class.^[1]

Essentially, this ship is designed to be an enlarged version of the Kunigami class, with a helicopter deck and hangar as a successor to Mizuho (PLH-21).^[2] As well as being a platform for helicopters, she also functions as a depot ship: replenishing fuel, potable water and stores to small patrol crafts and resting their crew. And as a frontline command center, she also has excellent command and control functions.^[1][3]

She is armed with one Bofors L/70 40 mm gun (Bofors 40 Mk4) and one JM61-RFS 20 mm gun, each controlled by an electro-optical director.^[3] The Sikorsky S-76D helicopters was supposed to be used as the shipboard helicopters,^[2] but in actual, the Bell 412 helicopters were transferred directly from the PLH-21.^[1][3]

• "ヘリ搭載巡視船「みずほ」：下関で引き渡し式 来月、名古屋海保に配属" (in Japanese). Mainichi shinbun. 23 August 2019.
• Kaijin-sha, ed. (July 2018). "Patrol Vessels - Ships of Japan Coast Guard". Ships of the World (in Japanese) (881). Kaijin-sha: 39–90. NAID 40021585370.
• Kaijin-sha, ed. (November 2019). "JCG's New PLH Mizuho PLH-41 Completed". Ships of the World (in Japanese) (911). Kaijin-sha: 53–57. NAID 40022027891.
• Kaijin-sha, ed. (October 2020). "Patrol Vessels - Ships of Japan Coast Guard". Ships of the World (in Japanese) (933). Kaijin-sha: 39–90. NAID 40022358584.

• Media related to IMO 9820752 at Wikimedia Commons
• 海上保安廳大型直昇機巡視船 (in Chinese)

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