Page 57: of Marine News Magazine (November 2021)

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my is reshaping the way work is being done by vessel crews on the water.”

Sea Machines noted the Rachael Al- len project marks its ? rst installation of an autonomy system on a vessel over 5,000 horsepower. Designed by Jensen

Maritime Consultants, the 100- by 40- foot tractor tug will be able to escort the largest tankers and containerships calling the U.S. West Coast ports that it will serve. The vessel is out? tted with two MTU Series 16v4000M65L EPA

Tier 4 main engines, producing 6,866 horsepower and coupled to Kongsberg

US255 azimuth thrusters.

The MTU selective catalytic reduc- tion (SCR) system provides optimi- zation of the engine delivering im- proved ef? ciencies, fuel consumption is reduced by 8% at full power and 14-22% over a wider operating range compared to previous MTU engines in this power range. The MTU engine and SCR are designed with a high fo- cus on noise reduction, standard fea- tures such as resilient mounting, tur- bocharger air intake silencers and the

SCR insulation and noise abatement, all combined to produce noise levels throughout the vessel without any tra- ditional exhaust silencers. The MTU engines are also equipped with MTU

Go, a MTU digital monitoring sys- tem and service that allows continu- ous monitoring of the engines includ- ing all engine parameters and alarms, with trending and broadcast of engine alarms through the MTU Go App.

Rachael Allen is out? tted with

Mackay Marine Electronics, and tow- ing equipment consists of a Markey

DEPGF-52R winch with 750 feet of 10-inch synthetic line on the bow and a Markey DEPC-32 stern winch with 250 feet of 6.5-inch circumference line on the stern. The tug is built to U.S.

Coast Guard Subchapter “M” regula- tory standards, with ABS loadline cer- ti? cation and UWILD notation.

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