A new McAllister Towing escort tug will enhance operations at US east coast terminals
McAllister Towing has ordered a new tug from Washburn & Doughty shipyard in Maine, USA for harbour and terminal operations, escort duties, coastal towing and emergency response.
This azimuth stern drive (ASD) tug will boost the US towage group’s escort fleet on the US east coast at a time when larger container ships are berthing at expanding container terminals.
Its propulsion will provide a free running speed of more than 14 knots and a bollard pull of around 82 tonnes.
It will have a pair of Caterpillar CAT 3516 engines, which will develop 2,525 kW of power at a speed of 1,800 rpm each driving a Schottel Rudderpropeller of type SRP 490.
These will each have a fixed pitch propeller of 280 cm in diameter. Schottel has been manufacturing propellers and thrusters for McAllister for 30 years and has now delivered more than 70 azimuth thrusters.
SRP 490 Rudderpropellers have a maximum power rating for tug duties between 2,350 and 2,550 kW per engine. Schottel has introduced several technical updates to increase bollard pull to more than 80 tonnes. It also introduced ProAnode enhancing corrosion protection to its SRP 490 range.