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grain, coal, or ore. In the devel- opment of the hull lines, special experiments were carried out in the ice-breaking laboratory at Wartsila's Helsinki shipyard. To reduce ice resistance, the ships will be fitted with air-bubbling systems developed and patented by Wartsila. The ships will be built to the highest Ice Class of the U.S.S.R. Register of Shipping. They will also meet the latest international requirements for safety and en- vironmental protection, as well as Soviet sanitary requirements. PSI Announces Contracts For ACOE Dredges Propulsion Systems, Inc., Kent, Wash., has been awarded a se- ries of major contracts to furnish controllable-pitch propellers, bow thrusters, and rotary vane steer- ing gear on the large and medium class dredges being built for the Army Corps of Engineers. Both the large and medium class dredges being built at Avon- dale Shipyards and Sun Shipbuild- ing, respectively, will be equipped with PSI/Liaaen E 105 four- bladed controllable-pitch propel- lers in nickel-aluminum-bronze. The controllable-pitch propel- lers for the large dredge will be 12 feet 6 inches in diameter and capable of absorbing 5,200 bhp per shaft line at 170 rpm, while the 12-foot 6-inch-diameter pro- pellers for the medium class dredge will be capable of absorb- ing 3,600 bhp per shaft line at 155 rpm. Both controllable-pitch propel- ler systems will be furnished with micro-processor based electronic controls designed and manufac- tured by PSI. In addition to the controllable- pitch propellers, the large dredge will also be equipped with PSI/ Frydenbo HS 180 rotary vane steering gear with PE-type power units. The steering gear is capable of developing 260,000 ft/lbs of torque per rudder at low oper- ating pressures which provides safe and reliable operation of the steering system. Lock valves which are integral with each steering motor further enhance the system's safety and reliability in preventing fluid loss from the rotary actuator in the event of a burst pipeline. The PSI/Brunvoll SPX-YP 600- hp controllable-pitch bow thruster will be supplied on the medium class dredge to aid in maneuver- ability. PSI has supplied over 300 Brunvoll thrusters in the U.S.A. Propulsion Systems, Inc. is the exclusive U.S. licensee for AM Liaaen Controllable Pitch Propel- lers and Frydenbo Rotary Vane Steering Gears, as well as the ex- clusive U.S. sales agent for Brun- voll Bow and Stern Thrusters. Maritime Association Names Parkhill New President, Buckley, VP Charles B. Parkhill, president and chief executive officer of South African Marine Corpora- tion (U.S.A.) has been elected president of The Maritime Asso- tion of the Port of New York. He succeeds Charles T. O'Neill, president of Jaton Environ, Inc. N. Nick Cretan was reelected ex- ecutive director. Robert M. Buckley, a partner of Simpson, Spence and Young, was elected vice president and di- rector, and Thomas A. Fain, pres- ident of the American Institute of Marine Underwriters, was named treasurer and director. Directors elected for three-year terms were: Donald G. Aldridge, Delta Steamship Lines; Kenneth W. Gundling, United States Lines; William N. Johnston, American Bureau of Shipping; Neill A. Mc- Allister, McAllister Brothers, Inc.; William R. Petersen, New York Sandy Hook Pilots; and Robert H. Pouch, Barber Steamship Lines. IT TAKES KNOWING THE ROPES TO BE A WINNER ON THE WATERFRONT. IT TAKES MIDLAND. Midland's high level of experience as the insuror in complex and specialized Maritime waterfront operations means you have access to the expertise needed to plan the specific coverage that's right for you. If you're in stevedoring, ship repair, dredging, terminal operations—in short, if you're on the waterfront— call Midland. We know the ropes. Midland Insurance Company The Decisive Specialists 160 Water Street, New York, New York 10038 Telephone (212) 248-1130 August 1, 1980 ZIDELL 31
