Page 44: of Marine News Magazine (May 2025)

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Markey Hawser Winch.

Deck Machinery

Heavy Haulers

Founded in 1907, Markey Machine is the oldest private- ly-held winch manufacturer in the U.S., and is among the pioneers in electric winching, embracing winches working aboard Active-Front End (AFE) con? gured boats. Markey has also led the ? eld in constant-tension winch control, coining the term “render/recover” as part of the ? rst pro- totypes developed in the mid-1990s. Markey further de-

Image courtesy Markey Machine veloped render/recover and trademarked its most advanced form, the Markey Asymmetric Render/Recover (TM, trade- DMT Marine enjoyed a milestone late last year when it mark symbol) in 2004. Most recently, Markey can be found signed a deal to equip a pair of Canadian Navy tugboats. on a pair of innovative workboats. The vessels, built to the RAmparts 2400 design by the Ca-

McAllister Towing and Transportation Company earlier nadian shipyard Groupe Océan. Each vessel will be out? tted this year welcomed a newbuild tractor tug to its ? eet, Isabel with a comprehensive set that includes a towing and hawser

McAllister. Built by Washburn and Doughty Associates, the winch, an anchor mooring capstan, and various deck ? t- tug is rated at 6,770 horsepower, boasting an 84 tons bollard tings, all designed to ensure high performance. The equip- pull. It is powered by two, Tier IV Compliant, Caterpillar ment will be powered by DMTs’s electric and hydraulic con- 3516E engines, with an SRP 490 FP Z-Drives propulsion trol systems.

system supplied by Schottel. The vessel also features two Rapid naval response in mission-critical situations de-

John Deere 4045 AFM85 Tier III, 99 KW generators, with pends on the reliability of davit systems for ef? cient launch a 72 horse power Markey DEPCF-52 towing gear. and recovery of daughter craft in challenging marine envi-

Late last year, Markey out? eed the RASCAL Tugboat ronments. And Vestdavit’s ongoing deliveries of its innova- with Markey Machine’s DEPC-42 Hawser Winch. The tive PLRH-5000 rescue boat davits for a series of US Navy vessel was a delivered by Diversi? ed Marine, Inc. to Brusco newbuild refuelling vessels at General Dynamics NASSCO

Tug & Barge, Inc. As the ? rst in the RAscal 2000 D series, demonstrate its proven credentials in this market segment.

the RASCAL is designed to ? ll an emerging niche in sec- Successful sea trials were recently performed at the San ondary ports. Design by Robert Allan Ltd. and powered by Diego, US-based shipbuilder on the ? rst pair of davits de-

Caterpillar C32 T4 engines driving Berg Propulsion MTA livered for the USNS Robert F. Kennedy that is one of 10 522 Z-drives, RASCAL sports a bollard pull of 42ST, with so-called T-AO oilers being built at the yard, with Vestdavit an option for 50ST+. to deliver a total of 14 davits on seven of these newbuilds - two per vessel. The PLRH-5000 davits are equipped with sophisticated motion compensation and safety features to

Vestdavit optimize the ef? ciency of launch-and-recovery operations for seven-meter RHIBs deployed from these vessels.

Features include shock absorbers for removing peak loads, constant tension for safe and ef? cient recovery in high sea states, and guiding arms that act as an anti-pendulation de- vice to keep the RHIB steady. The PLRH-5000 is supplied as a fully self-contained and skid-mounted davit that makes it easy and quick to install. It is also certi? ed according to all relevant class standards based on veri? cation of design, ma- terials and safety, while rigorous fabrication testing smooths

The PLRH- 5000 is tested the commissioning process. Vestdavit is a leading Norwe- during sea gian supplier of high-speci? cation davit systems with a track trials at GD

NASSCO.

Images courtesy Vestdavit record of over 2000 deliveries to most NATO navies.

44 | MN May 2025