Lindenau Yard Delivers Seismic Research Vessel To Western Geophysical

After a rebuilding period of only three months, the Lindenau Shipyard in Kiel, West Germany, recently delivered the seismic research vessel Western Challenger (shown above), the latest addition to the seismic fleet of Western Geophysical Company, a Litton subsidiary.

With an overall length of almost 319 feet, the rebuilt ship is one of the largest of its type in the world, and is fitted with state-of-the-art geophysical equipment including an LRS-16, 480-channel, full digital recording system and telemetry streamer cable. The Challenger will be operated by Western's Europe/ Africa/Middle East Division headquartered in London.

Initial testing and trials were done in the North Sea, though the ship is classed for worldwide operation.

With a cruising speed of 16 knots, the costly travel time between survey areas will be reduced significantly.

Main propulsion is provided by two Deutz 8 M 358 diesel engines, each with an output of 2,500 bhp at 325 bhp. These drive an Escher- Wyss propeller unit and two shaft generators.

The ship is equipped with Western's high-pressure (4,500-psi) air guns, but with the capability of shooting much larger arrays due to a doubling of the total on-board air compressor capability.

Main rebuilding work included: extension and part renewal of existing accommodations for 60 persons; installation of the seismic equipment; fitting out of a compressor room including installation of five electric-driven, 4,500-psi compressors; installation of a new electricdriven bow thruster; and integration of a helicopter deck atop the new aft deckhouse.

Maritime Reporter Magazine, page 7, Dec 15, 1984

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