Page 12: of Maritime Reporter Magazine (February 1981)

Deck Machinery — A Review

MacGregor Comarain (continued from page 13) nearing completion at Levingston

Shipbuilding, three RO/RO-con- tainerships building at Sun Ship for Waterman Steamship Compa- ny, Farrell Lines' two container- ships delivered recently by Beth- lehem's Sparrows Point yard, Wa- terman's two LASH ships deliv- ered by Avondale last year, and the two heavy-lift vessels con- structed by Peterson Builders for

American Heavy Lift.

MacGregor-Comarain Inc. has been an integral part of the U.S. maritime community for more than 33 years, during which time it has furnished nearly 200 ship- sets of cargo access equipment to

American shipbuilders. As part of that community, said company president John Nydegger, it will continue to support and encour- age the expansion and growth of

U.S.-flag construction.

MARATHON

LeTOURNEAU

Marathon LeTourneau marine pedestal cranes, installed on all classes of the Houston compan- ny's self-elevating, offshore drill- ing platforms and supplied to other segments of the marine in- dustry for installation on other types of vessels, are manufac- tured in a range of lifting capac- ities and configurations to meet many offshore industry needs.

Models PCM-80AS, PCM-120

AS, and PCM-350 make up the

Marine Division's line of pedestal cranes. All three models can be supplied to American Bureau of

Shipping specifications, and uti- lize the field-proven LeTourneau diesel-electric power system that greatly simplifies operation. All are of proven design, which has not required significant modifica- tion since its introduction.

This design features a main column, or pedestal, that serves both as housing for main bearing and mounting for the swing gear, thus eliminating the need for hook rollers. In the unlikely event of support bearing failure due to overload, the crane body comes to rest on the pedestal rather than breaking free. The original de- sign also incorporates a fail-safe, spring-loaded braking system. If power is interrupted, the operat- ing system locks, thus preventing uncontrolled movement of hook, luffing, or swing members.

The versatile and widely used, variable-radius, full-revolving

PCM-120 AS marine pedestal crane, several of which are nor- mally standard equipment on

Marathon jackup offshore rigs, is also available in optional models

PCM-120 and PCM-120C. The unit has a 50-ton maximum lifting ca- pacity when equipped with a 100- foot boom. The unique column design provides ideal support for operation of the swing gear and its motor-driven pinion. PCM- 120AS swing and hoist functions are powered by dc motors to per- mit smooth operation at infinitely variable speeds.

The standard gantry for mod- els PCM-120 AS, PCM-120, and

PCM-120C features an all-welded, two-piece frame that greatly sim- plifies erection. The Marathon

LeTourneau engineered boom, an- other proven design, features ball joint mount. Boom insert sections allow for a wide choice of boom lengths, ranging from a minimum of 60 feet up to 120 feet. A jib with separate winch for a 5-ton straw line is also available.

Newest and largest capacity

Marathon LeTourneau variable- radius marine pedestal crane, the 60-ton-capacity at 58-foot out- reach PCM-350, utilizes dc elec- tric motors for smooth operation and control of main hook and boom luffing, straw line, and crane swing.

The unitized main frame, winch housing, and turntable are of all- welded, heavy steel plate. The main frame also serves as sup- port for the optional machinery house and operator's cab with con- trol console.

The PCM-350, which like all

Marathon marine pedestal cranes can be operated from the cab or a remote station, features a unique gantry with all-welded (continued on page 16)

The US.GG. says"Launch Away!"

World-renowned

Schat Life Raft Davits are now approved for use on

U.S. ships. Schat's Raft Launching

Davits are built to the highest standards and are now approved by every leading safety authority in the world. The latest seal of approval comes from the U.S. Coast Guard, allowing ship owners and builders to retrofit this proven davit on their vessels.

Slewing Arm Design. Schat's design features the slewing arm for maximum flexibility. The internal winch mechanism means that several fully-loaded inflatable rafts can be launched in sequence within 30 minutes. Simple to operate, easy to maintain, and designed for space-saving stowaway, the

Raft Launching Davit is fitted on hundreds of ships, ferries, oil rigs and platforms around the world. Now it's made in America for

American ships and offshore structures.

For full details on the Raft Launching Davits or other items of Schat lifting and transfer equipment, contact The Schat Davit Corpo- ration. 226 West Park Place. Newark.

Delaware 19711. Telephone: 302/366-1961.

Telex: 835374. •SCHAT

Leaders in lifting and transfer 14 Write 419 on Reader Service Card Maritime Reporter/Engineering News