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MK 86 Gun Fire Control System (GFCS)

The AN/SPY-1 series radar system works with two fire control systems on AEGIS class ships: the Mk 99 Missile Fire Control System and the Mk 86 Gun Fire Control System (part of the Mk 34 Gun Weapon System). The Mk 86 GFCS was also found on SPRUANCE class destroyers and worked with the Mk 91 Missile Fire Control System.

The MK 86 Gun Fire Control System (GFCS) provide ships of destroyer size and larger with an economical, versatile, lightweight, gun and missile fire control system which is effective against surface and air targets. The Mark 86 fire control system is a substantial improvement over the earlier Mark 68 system that was developed following World War II. It uses a track-while-scan radar coupled with a digital computer.

The Mark 86 system was developed from a 1963 Navy requirement to provide new construction ships with an improved surface-to-surface gunfire control capability. Subsequent requirements added an anti-air and self-defense missile control capability. Mark 86 systems have been purchased for installation at Navy training sites and onboard recent construction and conversion destroyers, cruisers and Tarawa class amphibious assault ships. The Navy purchased additional systems for the Ticonderoga class AEGIS cruiser and selected guided missile destroyers. Lockheed Electronics Company developed and is manufacturing the Mark 86.

The MK 86 Gun Fire Control System (GFCS) is the central sub-element of the Gun Weapons System (GWS). It provides singular or dual remote control of the ship's forward and aft 5"/54 caliber gun mounts to engage up to two targets simultaneously. The GFCS is the primary fire control radar for NGFS, SUW and AW gun engagements. From a Gunnery Officers perspective, the GFCS is the controlling element where loading and firing orders originate. Operators can select from various GFCS modes from which the system calculates ballistic gun orders. These orders can be modified by console operators to correct for environmental effects on ballistics. The GFCS conducts direct firing attacks against surface radar and optically tracked targets, as well as indirect firing during Naval Gun Fire Support (NGFS).

The Mk 86 Gun Fire Control System (GFCS) is the central sub-element of the Mk 34 Gun Weapons System (GWS) on AEGIS class ships. It controls the ship's forward and aft 5"/54 caliber Mk 45 gun mounts and can engage up to two targets simultaneously. The SPQ-9 series and Mk 23 TAS (Target Acquisition System) work together to provide control for Naval Gun Fire Support (NGFS), Submarine Warfare (SUW) and Anti-Air Warfare (AW) gun engagements.

The Mk 86 GFCS also uses a Remote Optical Sighting system. This is a separate TV camera with a telephoto zoom lens mounted on the mast and each of the illuminating radars. The optical sighting system is known as ROS on the SPRUANCE class destroyers and is mounted on the SPG-60 illumination radar. The Mk 34 GWS on AEGIS class destroyers and cruisers uses the Mk 46 Mod 0 Optical Sight System on the SPG-62 illuminators.

The Mk 86 GFCS is the controlling element, where loading and firing orders originate. After an operator selects the GFCS mode, the system calculates ballistic gun orders. These orders can be modified to correct for environmental effects on ballistics. The GFCS conducts direct firing attacks against surface radar and optically tracked targets, as well as indirect firing during Naval Gun Fire Support (NGFS).



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