JS Chiyoda (2016)

Last updated

JS Chiyoda(ASR-404) left front view at Kawasaki Heavy Industries Kobe Shipyard Novenber 11, 2017 01.jpg
JS Chiyoda at Kobe on 11 November 2017
History
Naval Ensign of Japan.svgJapan
Name
  • Chiyoda
  • (ちよだ)
Namesake Chiyoda
Ordered2014
Builder Mitsui, Tamano
Laid down13 October 2015
Launched17 October 2016
Commissioned20 March 2018
Homeport Yokosuka
Identification
StatusActive
Class overview
Preceded by Chihaya class (1998)
Succeeded byN/A
General characteristics
Type Submarine rescue ship
Displacement5,600–7,100 long tons (5,690–7,214  t) full load
Length128.0 m (419 ft 11 in)
Beam20.0 m (65 ft 7 in)
Draught9.0 m (29 ft 6 in)
Depth5.1 m (16 ft 9 in)
Propulsion
Speed20 knots (37 km/h; 23 mph)
Range6,000 nmi (11,000 km; 6,900 mi) at 13 kn (24 km/h; 15 mph)
Boats & landing
craft carried
Complement125
Sensors and
processing systems
  • Atmospheric pressure diving device
  • Automatic ship position holding device (DPS)
  • Diving rescue device (DSRS)
Aviation facilities Helipad

JS Chiyoda (ASR-404) is a submarine rescue ship of Japan Maritime Self-Defense Force.

Contents

Development and design

It was built as a replacement for the older dilapidated submarine rescue ship with the same name: JS Chiyoda (AS 405). In terms of design, it is said to be an expanded version of the later, more modern submarine rescue ship JS Chihaya (ASR 403).

The appearance is almost the same as Chihaya, but the mast has been changed to a tower shape. Both the installed DSRV and ROV are new, and the number of people that can be rescued by one dive has been increased from 12 to 16 on the Chihaya-equipped boat, and the submersible's battery has been changed from a silver/zinc compound secondary battery to a lithium-ion secondary battery. We changed it to shorten the charging time. ROVs have significantly better mobility and search ability than previous equipment, making it possible to accurately check the status of distressed submarines, improving on something that DSRVs have traditionally done.

Like the older Chiyoda and Chihaya, the ship has a Deep Submergence Rescue Vehicle (DSRV) to rescue the crew of the submarine, as well as a new Remotely Operated Vehicle (ROV). It will also be equipped with a complete set of submersible rescue devices (DSRS) and include unmanned underwater vehicles (ROV). The ship is equipped with three recompression (hyperbaric) chambers available for diving disease treatment for post-rescue response.

However, the suite of submarine tender functions, such as: refueling submarines, extra torpedoes, stores, spare parts and fresh water plus accommodation and rest facilities for the submarine's crew, which were built into the older Chiyoda, were omitted.

In addition, in the event of a large-scale disaster, it will be used as a base for medical support, livelihood support for disaster victims, and bathing support. Like Chiyoda (56AS) / Chihaya (08ASR), its capabilities will be further strengthened. Two surgical beds and about 10 beds are installed for this purpose.

The main engine is the same diesel as Chihaya, but the fuel tank has been enlarged to have a sufficient cruising range even at high speeds, and it has become possible to reach destinations such as rescue areas quickly.

Construction and career

Chiyoda was laid down on 13 October 2015 at Mitsui Engineering and Shipbuilding, Tamano and launched on 17 October 2016. The vessel was commissioned on 20 March 2018.

After 15:00 on 1 May 2018, five men and women fell from a pleasure boat sailing in the vicinity while anchoring off the coast of Ito Port in Shizuoka Prefecture for a temporary stay for individual ship training in the north of Hatsushima, Sagami Bay. The crew visually recognized it, and to rescue the drowning man, they lowered the work boat from the ship and carried out rescue and rescue activities. On June 14, the same year, Japan-US hygiene joint training was conducted with the Self-Defense Forces Yokosuka Hospital, Yokosuka US Navy Hospital, and the US Navy Mercy-clas hospital ship USNS Mercy.

Before dawn on 26 May 2019, two cargo ships collided at sea about 11 km south of Inubosaki in Choshi City, Chiba Prefecture. The captain, who was rescued about two hours after the sinking of the Chikatsu Maru (5-seater, 499 tons) owned by Katsumaru Kaiun in Imabari City, Ehime Prefecture, said, "Everyone was on board when the collision occurred." , one was found on board the ship on the 26th and was confirmed dead, but a sound was heard in the second Japan Coast Guard diver's investigation from around 0:30 pm on the 27th, and even after five dives in the room. I confirmed the sound near a certain stern. When a diver hits the hull with a plastic hammer three to four times, a slight tapping sound is heard after a few seconds, and the missing person may be in a place where air remains on the ship. The person is rescued soon after. [1]

From October 16 to December 7 of the same year, she was dispatched to participate in the 8th Western Pacific Submarine Rescue Training (Pacific Reach 2019) sponsored by the Royal Australian Navy. The training will be conducted from November 4 to November 15 in the waters west of Perth, Australia, and the participating countries will be the United States, the Australian Federation, the Republic of Korea, the Republic of Singapore, Malaysia and 20 observer participating countries in addition to Japan. Submarine rescue training, search and rescue demonstrations for distressed submarines, etc. [2]

Related Research Articles

<span class="mw-page-title-main">Submersible</span> Small watercraft able to navigate under water

A submersible is an underwater vehicle which needs to be transported and supported by a larger watercraft or platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent operation at sea.

<span class="mw-page-title-main">Deep-submergence vehicle</span> Self-propelled deep-diving crewed submersible

A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs, which are intended to be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions, or both. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.

<span class="mw-page-title-main">Japan Maritime Self-Defense Force</span> Maritime warfare branch of Japans military

The Japan Maritime Self-Defense Force, abbreviated JMSDF, also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) after World War II. The JMSDF has a fleet of 154 ships, 346 aircraft and 50,800 personnel.

<span class="mw-page-title-main">Deep-submergence rescue vehicle</span> Submersible used for rescue of downed submarines and clandestine missions

A deep-submergence rescue vehicle (DSRV) is a type of deep-submergence vehicle used for rescue of downed submarines and clandestine missions. While DSRV is the term most often used by the United States Navy, other nations have different designations for their vehicles.

The Type 925 Dajiang with NATO reporting name Dajiang, or 大江 in Chinese, meaning Great River, is a type of naval auxiliary ship belonging to the People's Republic of China. Each ship is usually equipped with up to two Type 7103 DSRV class Deep Submergence Rescue Vehicles (DSRVs). The ship is designed to replace the first People's Liberation Army Navy (PLAN) submarine tender PLANS Mount Tai, and the lead ship of the Dajiang class is the Changxingdao. The Type 925 is a submarine tender that can also be used as a submarine rescue ship, and hence, it is designated as a submarine support ship by Chinese.

<span class="mw-page-title-main">Submarine rescue ship</span> Support ship for submarine rescue and deep-sea salvage operations

A submarine rescue ship is a surface support ship for submarine rescue and deep-sea salvage operations. Methods employed include the McCann Rescue Chamber, deep-submergence rescue vehicles (DSRV's) and diving operations.

<i>Cheonghaejin</i>-class submarine rescue ship Submarine rescue ship

The Cheonghaejin class is a submarine rescue ship class of the Republic of Korea Navy. Only one ship has been built in the class, ROKS Cheonghaejin, in 1995. Its operations include rescuing trapped sailors in submarines, naval operation support for submarines, underwater research and mapping support, and recovery of sunk vessels. It is equipped with a deep submergence rescue vehicle (DSRV) that operates up to 500 metres (1,600 ft), and a rescue chamber that holds up to nine people.

JS <i>Ōsumi</i> Ōsumi-class tank landing ship of the JMSDF

JS Ōsumi (LST-4001) is the lead ship of the Ōsumi-class tank landing ships of the Japan Maritime Self-Defense Force (JMSDF).

JS <i>Ise</i> Japanese helicopter destroyer

JS Ise (DDH-182) is a Hyūga-class helicopter destroyer of the Japan Maritime Self-Defense Force (JMSDF). It is the second ship to be named Ise, the first being the Imperial Japanese Navy World War II-era battleship Ise.

JS <i>Kurama</i> Destroyer of the Japan Maritime Self-Defense Force

JS Kurama (DDH-144) was the second ship of the Shirane-class destroyer in service with the Japan Maritime Self-Defense Force (JMSDF).

JS <i>Chiyoda</i> (1983)

JS Chiyoda was a submarine rescue ship of the Japan Maritime Self-Defense Force.

JS <i>Taigei</i> Taigei-class attack submarine

JS Taigei (SS-513) is the first boat of the Taigei-class attack submarine of Japan Maritime Self-Defense Force. The submarine was ordered from Mitsubishi Heavy Industries in 2017 and laid down on 16 March 2018 at Kobe, Japan. Taigei was launched on 14 October 2020 and commissioned on 9 March 2022.

JS <i>Zuiryū</i>

JS Zuiryū (SS-505) is the fifth boat of Sōryū-class submarines. She was commissioned on 6 March 2013.

JS <i>Chihaya</i> Submarine rescue ship Chihaya

JS Chihaya (ASR-403) is a submarine rescue ship of Japan Maritime Self-Defense Force.

JDS <i>Fushimi</i> Submarine rescue ship Fushimi

JDS Fushimi (ASR-402) was a submarine rescue ship of Japan Maritime Self-Defense Force.

JDS <i>Chihaya</i> Submarine rescue ship Chihaya

JDS Chihaya (ASR-401) was a submarine rescue ship of Japan Maritime Self-Defense Force.

JS <i>Bungo</i> JMSDF mine countermeasure vessel

JS Bungo (MST-464) is the second ship of Uraga-class mine countermeasure vessel.

JS <i>Fuyushio</i> Harushio-class submarine

JS Fuyushio (SS-588) was the sixth ship of theHarushio-class submarine of Japan Maritime Self-Defense Force.

JS <i>Asashio</i> (SS-589) Harushio-class submarine

JS Asashio (SS-589) was the seventh ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.

Submarine rescue is the process of locating a sunk submarine with survivors on board, and bringing the survivors to safety. This may be done by recovering the vessel to the surface first, or by transferring the trapped personnel to a rescue bell or deep-submergence rescue vehicle to bring them to the surface. Submarine rescue may be done at pressures between ambient at depth, and sea level atmospheric pressure, depending on the condition of the distressed vessel and the equipment used for the rescue. Self-rescue of submarine personnel by buoyant free ascent at ambient pressure is considered submarine escape. Survivors may require recompression treatment for decompression illness.

References

  1. ↑ INC, SANKEI DIGITAL (28 May 2019). "海自、潜水艦救難艦派遣 貨物船衝突事故の救助で夕方到着". 産経ニュース (in Japanese). Retrieved 24 November 2020.
  2. ↑ https://www.mod.go.jp/msdf/release/201910/20191015-2.pdf [ bare URL PDF ]
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.