McAllister Towing has expanded its fleet of environmental tugboats by adding a second of a series of four that meet stringent US emission regulations.
New tugs with lower emissions of sulphur and nitrogen oxides and particulates were required for its US east coast operations.
It took delivery of Rosemary McAllister at the end of May as a sister tug to Capt Brian A McAllister.
Both of these tugs meet US Environmental Protection Agency’s Tier 4 and IMO Tier III requirements for emissions.
These 30.5 m tugs have bollard pulls in excess of 80 tonnes. They have a pair of 3516E Tier IV Caterpillar engines, which combined generate 5,050 kW of power and drive two Schottel SRP 4000 fixed propeller units.
Rosemary McAllister is classed by ABS as an escort, shipdocking and rescue tug with fire-fighting capabilities. During sea trials, it achieved a bollard pull of 82.5 tonnes. Rosemary McAllister is due to start work in Virginia this month and expands McAllister’s tug fleet to 32 vessels.