Page 18: of Maritime Reporter Magazine (June 1971)

Multiply your advantages with compound propulsion systems from Caterpillar

If you need over 2250 horsepower, you need not rely on one big diesel.

A compound propulsion system incorporating Caterpillar

Diesels will multiply your reliability and safety factor and give you economies in power flexibility, too. It gives you the ability to adjust power to the load, reducing fuel con- sumption and required maintenance.

You might compound Cat Diesels on a single screw. Like the GULF JOAN which has four D398s connected to a

Lufkin marine gear. This allows the use of from one to all four engines, depending on the load.

The Cat D398 Diesel Engines each develop 765 hp to give the GULF JOAN a total of 3060 propulsion hp. The 149 ft. tug has a 33 ft. beam and 18 ft. draft. She makes 14 knots light and 10 knots towing a 6000 ton deck cargo barge.

A single lever in the engine room controls all four engines or each can be controlled separately. So the captain has all the power he needs, but can use only the power he needs.

Ship's service aboard the GULF JOAN is supplied by two Cat D333 Diesels driving 75 kw generators. Another Cat 20 Maritime Reporter/Engineering News