Page 24: of Maritime Reporter Magazine (July 1981)

Shipboard Automation & Monitoring Systems —Henschel (continued from page 24) appropriate, it meets U.S. Coast

Guard requirements and is certi- fied by the American Bureau of

Shipping for AC/ACCU classi- fications.

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HYDE PRODUCTS

The Hyde Henschel rudder fail- ure alarm and steering gear mon- itoring system is designed to ac- tuate an audible and visual alarm in the pilothouse when the rud- der differs more than five de- grees from the position ordered by the helm for more than 30 seconds for ordered rudder posi- tion changes of 70 degrees, or five seconds for ordered rudder position changes of 1 degree.

This system will also actuate audible and visual alarms if the rudder fails to move within four seconds in the correct direction for the ordered command, or if after seven seconds the rudder is moving at a rate of less than two degrees per second. This mode is non-operative for ordered rudder position changes of less than five

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Amepon

PCD81-9 degrees. The alarm is operative in both the auto and hand electric mode of steering, but is deacti- vated in the non-followup mode.

The system is comprised of three units: rudder failure alarm panel, rudder angle transmitter, and helm-mounted sensor. The failure alarm panel is for bulk- head mounting in the pilothouse and contains an alarm bell and indicating light. A conventional rudder angle transmitter is pro- vided for mounting at the ship's rudder. The third element of the system is a sensor that will be mounted in the steering trans- mitter in such a way that it is rotated by the operation of the helm wheel or autopilot. All de- vices are "self-checking" so that a fault in the devices will be in- dicated.

The Hyde automatic power transfer system is designed to provide automatic pilothouse con- trol of steering systems that cur- rently use manual power unit transfer procedures.

A typical manual transfer pro- cedure consists of: sending one of the ship's crew to the steer- ing gear room; shutting down the active power unit; shifting the transfer valve to the idle pow- er unit; and energizing the idle power unit. In an emergency, precious minutes could be lost in such a procedure. The Hyde de- sign provides an actuator on the transfer valve plus all the neces- sary electrical logic to perform the transfer in less than 15 sec- onds.

When a decision to transfer power units is made, a selector switch is rotated in the pilot- house, the transfer valve is shifted automatically, and the ap- propriate power unit energized.

Detection devices monitor the transfer. If the total cycle is not completed within 15 seconds, an audible and visual alarm is en- ergized in the pilothouse and the control room. The existing man- ual means of transfer is main- tained.

The electrical logic in this sys- tem can be adapted to interface with a Hyde steering failure alarm and steering gear moni- toring system to automatically transfer power units should the active unit fail.

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MAGNAVOX

Interfacing with any shipboard navigation, logging, or measuring device having a Baudot or ASCII output, the Magnavox MX Ill-

VMS automatic vessel monitoring system is a complete data trans- mission arrangement for vessel monitoring via MARISAT. Any such data acquired aboard ship can be transmitted to any shore- side telex number at programmed intervals or upon request. The

Maritime Reporter/Engineering News