Mauritius - National Coast Guard
75 m Offshore Patrol Vessel
ABS Class A1E AMS
CGS Vigilant

Prime Mover Controls Inc. designed and manufactured the propulsion control consoles which are located at the three bridge stations and at the machinery control station. These propulsion control consoles incorporate the ship’s controls and instrumentation.

Two PMC Type PCA-2LA pitch controllers ensure maximum propulsion versatility. The fast stable automatic load control incorporated in the pitch controller maintains optimum loading on the engines. Special operational modes with dedicated pitch programs are provided for manoeuvring with one or two engines and also operating the fire pump driven by the port inboard main engine. For example, the port propeller can be driven by the outboard engine in variable speed mode, while the fire pump is driven by the inboard engine in constant speed mode. Automatic load sharing is also incorporated to satisfy the close control tolerance required by two engines driving a single propeller.

A PMC mimic panel in the machinery control console displays the status of machinery for main propulsion, ship’s service and emergency generators, switchboard indication and fire pump operation. The mimic panel includes lighted pushbuttons for main engine start and stop, as well as clutch control. Displays of engine rpm and propeller pitch are also fitted in the mimic.

All critical machinery functions are continuously monitored and displayed by a PMC Type 8001 alarm annunciator system. A Type 8101 group alarm repeater with serial communication to the machinery control room alarm system is provided at the center bridge station. A PMC Type 8110 tank level monitoring system continuously displays tank level information and provides high and low level alarms as well as high flow detection.

The control transfer system features 3-stage transfer from machinery control room to bridge (Request - Enable - Accept). In an emergency, immediate return transfer can be undertaken from the machinery control console at any time, causing warning alarms at all bridge stations.

The PMC Type 8201 pushbutton propulsion telegraph system provides emergency orders between the center bridge station and the machinery control room or the local at OD box stations. These solid-state, microprocessor based units include the nine standard telegraph orders. They also include functions for bridge control and lamp test as well as power failed and wrong direction indicators. An additional feature is a separate and independently operating group of orders for standby, cancel standby and finished with engines.

The PMC supplied DHR navigation lights are controlled and monitored in the bridge by a PMC Type 8010 navigation light control panel. This solid state electronic panel continuously monitors the status of the remote navigation lights when the lights are turned on or off. A visual and audible alarm is activated if a lamp, fuse or circuit fails. Dual power sources are also monitored and alarmed when either fails.

PMC also supplied a Type 8118 digital rpm system which displays shaft and engine rpm on digital meters at the machinery control station and analog meters at the bridge stations. A Type 8502 pitch indicator system also displays propeller pitch at all four stations.

PMC’s azimuth control components, Type 5360-1000 azimuth control head and Type 8161 azimuth display meter were installed in the bridge stations and integrated with the vessel’s bow thruster control system.

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