 FCS-1A on JDS Shirane | |
| Country of origin |  Japan |
|---|---|
| Introduced | 1972 |
| Type | Tracking |
| Frequency | X band |
FCS-1 was a Japanese ship gun fire-control system (GFCS). [1] [2]
| FCS-1A on JDS Shirane | |
| Country of origin | Japan |
|---|---|
| Introduced | 1972 |
| Type | Tracking |
| Frequency | X band |
FCS-1 was a Japanese ship gun fire-control system (GFCS). [1] [2]
In the 1950s, the Japan Maritime Self-Defense Force (JMSDF) used Mk 57 and Mk 63 as its main GFCS, but they were becoming obsolete. JMSDF was eager to introduce automated GFCS that supported automatic radar tracking, such as the American Mk 56, but it was rejected by the US Navy. Under the FY1955 program, a budget for purchasing one automated FCS overseas was approved. Jaberg (manufactured by Contraves) was selected and installed in JDS Harukaze in 1958. It was used for testing and research. [2]
Based on the results, the Technical Research and Development Institute ( 技術研究本部 , Gijutsu-kenkyū-honbu) began development of a domestic GFCS. In FY1965, a prototype was installed on JDS Harusame. This system got a good result and was titled Type 68. However, it was too advanced for the fleet, so a simplified model was developed and installed on JDS Nagatsuki in 1968, named Type 72, which became a mass-production model. [1] [2]
The prototype used a combination of unmanned radar director and manned electro-optical director, and was capable of track while scan (TWS). These two directors were integrated into one manned director as American Mk 56. TWS capability was omitted in the mass-production models. [1] [2]
An electromechanical analog computer was used for fire-control. [2] In the mass-production models, transistors were introduced for their radar and computer (replacing vacuum tubes). The prototype model measured the angular velocity of the line of sight by gyroscopic means (relative-rate) systems, and in the mass-production models, linear-rate systems were introduced. [1]
The two sub-types were: FCS-1A for 5-inch guns and FCS-1B for 3-inch guns. [1] [2]
Japan Maritime Self-Defense Force 
The Kongō class of guided missile destroyers in the Japan Maritime Self-Defense Force are equipped with the Aegis Combat System, and is the first of few ship classes outside the United States to have that capability. Following a decision made in December 2003, Japan is upgrading their Kongo-class destroyers with Aegis Ballistic Missile Defense System. The upgrade involves a series of installations and flight tests to take place from 2007 to 2010. JS Kongo was the first ship to have the BMD upgrade installed.
The Atago class of guided missile destroyers in the Japan Maritime Self-Defense Force is a modified version of the Kongō class equipped with the Aegis Combat System.
The Murasame-class destroyer is a class of destroyers, serving with the Japan Maritime Self-Defense Force (JMSDF). This is the first class of the second-generation general-purpose destroyers of the JMSDF.
The Takanami-class destroyer is a class of destroyer serving with the Japan Maritime Self-Defense Force (JMSDF). This warship is the slightly modified class of second-generation, general-purpose destroyers of the JMSDF.
The Hatsuyuki-class destroyer is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the first class of first generation of general-purpose destroyers of the JMSDF.
The Asagiri-class destroyer is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the second class of first generation general-purpose destroyers of the JMSDF.
The Takatsuki class destroyer was a vessel of the Japan Maritime Self-Defense Force. It was the predecessor of the Hatsuyuki-class destroyer, and was mainly used for anti-submarine warfare duties.
The Harukaze-class destroyer was the first indigenous post-World War II Japanese destroyer class. Its main mission was anti-submarine warfare.
The Murasame-class destroyer was a destroyer class built for the Japan Maritime Self-Defense Force (JMSDF) in the late 1950s as a successor to the Ayanami-class destroyers. Like its predecessor, its main task was anti-submarine warfare, but its improved weaponry also enabled it to perform better in the anti-air role, so this class was classified as "DDA" unofficially.
The Ikazuchi-class destroyer escort was a destroyer escort class built for the Coastal Safety Force in the late 1950s.
The Isuzu class destroyer escort was a destroyer escort class built for the Japan Maritime Self-Defense Force (JMSDF) in the early 1960s. The latter batch were quite different from the earlier two vessels in their propulsion and weaponry, so sometimes they were classified as the "Kitakami-class".
The Abukuma-class destroyer escort is the general-purpose destroyer escort of the Japan Maritime Self-Defense Force. It is the successor of the earlier Yūbari class.
Type 81 Fire Control System (FCS-2) is a Japanese shipboard gun and missile fire-control system. This series of systems has been installed on destroyers of the Japan Maritime Self-Defense Force built between FY1977 and FY2001 to control medium-caliber guns and Sea Sparrow missiles, including ESSM.
JDS Ikazuchi (DE-202) is the lead ship of Ikazuchi-class destroyer escort of Japan Maritime Self-Defense Force.
JDS Inazuma (DE-203) is the second ship of the Ikazuchi-class destroyer escorts of the Japan Maritime Self-Defense Force (JMSDF).
JDS Isuzu (DE-211) is the lead ship of the Isuzu-class destroyer escorts of the Japan Maritime Self-Defense Force (JMSDF).
JDS Mogami (DE-212) is the second ship of Isuzu-class destroyer escort of Japan Maritime Self-Defense Force (JMSDF).
JDS Kitakami (DE-213) is the third ship of Ikazuchi-class destroyer escort of Japan Maritime Self-Defense Force.
JDS Ōi (DE-214) is the fourth ship of Isuzu-class destroyer escort of Japan Maritime Self-Defense Force.
The Ariake-class destroyer is a class of destroyers of the Japan Maritime Self-Defense Force. Two ships of the Fletcher class were lent by the United States Navy and were in commission from 1959 until 1974.
Media related to FCS-1 at Wikimedia Commons