Page 12: of Maritime Reporter Magazine (November 1984)

Literature Available On

Sperry's New Deepwater

Navigation System

Sperry Corporation has an- nounced the development of a high accuracy, deepwater integrated navigation system for use aboard seismic exploration vessels, and is now offering this system to poten- tial users of such equipment.

Free literature is now available from Sperry completely describing the new system in detail.

A major advance in the Sperry system is a dead reckoning subsys- tem which uses a Sperry-devel- oped parametric array doppler sonar. This sonar is capable of ob- taining ship speed over the ocean bottom in depths of up to 6,000 feet. The subsystem also uses dual

Sperry high accuracy MK 29 Mod 1 gyrocompasses with velocity outputs.

In addition to the dead reckon- ing subsystem, the integrated nav- igation system includes two Loran receivers and data processing ca- pabilities for selected radio navi- gation aids. Extremely sophisti- cated data and signal processing techniques, including the u&e of five Kalman filters, are used in the system to reduce navigational errors.

All data processing for the sys- tem is performed by a 32-bit com- puter with a five megabyte disc memory. The computer program uses 152,000 words of memory. In

The Proven

Vacuum Toilet System from ENVIROVAC

The ENVIROVAC record

For ten years ENVIROVAC has been designing and supplying vacuum toilet systems for the U.S. Marine

Industry (Navy, Coast Guard, Corps of Engineers and

Commercial). Our toilets and systems are operating in, or on order for, 155 ships including:

Navy ships • DD963 Spruance class (30 ships) • DD993 Kidd class (4 ships) • T-ARC-7 Zeus (cable repair) • T-AK-(X) Rapid deployment force (8 ships)

Coast Guard ships • WMEC Famous cutter class (13 ships) • WHEC Secretary class (5 ships) • WYTM Bay class (7 ships) • WIX Eagle • WMEC medium endurance cutters (7 ships) • WLB buoy tenders, 180 ft. (36 ships)

ENVIROVAC Vacuum Systems offer 3 pint water flush with 90% reduction in sewage volume and sewage holding weights.

Dependable operation of ENVIROVAC's vacuum toilet was proven with eight months operating history on the USS Kinkaid (DD965). Only one man hour of maintenance per month per ship set was required to keep all 30 ENVIROVAC vacuum toilets 100% opera- tional. The same degree of high reliability is designed and built into the mechanical portion of the system.

No slope piping feature provides wide flexibility in pip- ing design and upward flushing capability.

Topside piping weight reduced 60-80% because smaller diameter piping (2 inch) is used.

Vitreous china toilet meets MIL-S-901C high shock specification.

Circle 127 on Reader Service Card addition to navigation informa- tion, the system provides guidance to the ship's crew for optimum ap- proaches to designated survey lines, and provides input to the ship con- trol system to permit the ship to remain on survey lines. Data log- ging on two magnetic tape drives is also provided. The system is controlled from any of four CRT terminals.

Among the key features of the ship's navigation system is the use of two Sperry CAS II collision avoidance systems which have been specially modified to display the position of the seismic streamer.

For free copies of the literature on this new navigation system,

Circle 82 on Reader Service Card

MarAd Awards Contract

To Southwest Marine For

Repairs To Training Ship

The Maritime Administration has awarded a $312,383 contract to

Southwest Marine, Inc. of San Fran- cisco for hull and machinery repairs to the California Maritime Academy training vessel Golden Bear. In- cluded are repairs to the anchor windlass, turbogenerator, main con- denser, and motor generator, and installation of a milling machine.

The repairs are required to meet

American Bureau of Shipping and

U.S. Coast Guard standards, and will be performed while the ship is at berth at the California Maritime

Academy in Vallejo, Calif. A sched- ule of 45 working days has been set for completion of the work.

Literature Available on

New Ultra-Long-Stroke

Diesel From M.A.N.-B&W

The first large engine in M.A.N.

B&W's new line of ultra-long- stroke engines was successfully tested recently in Copenhagen.

New color illustrated literature describing this new engine in full detail is now available free of charge.

M.A.N.-B&W reports this new engine type for the marine market will offer a combination of the low- est fuel oil consumption and lowest rpm, and the optimum in economy for shipowners.

The engine's small installation measurements require a minimum of engine space, thus increasing cargo capacity.

The two-stroke engines were de- veloped in Copenhagen and will be manufactured by B&W Diesel or by their worldwide network of li- censees. B&W Diesel's line of main engines for large ships cover a pow- er range of 2,300 to 56,000 hp.

For complete literature on

M.A.N.-B&W's full line of marine diesel engines including the new ultra-long stroke engines,

Circle 18 on Reader Service Card 14 Maritime Reporter/Engineering News