McAllister Towing’s latest tug new delivery meets both US Environmental Protection Agency’s Tier 4 and IMO Tier III requirements for emissions
McAllister Towing expanded its fleet with a powerful escort tractor tug that exceeds the latest and most stringent North American and international environmental regulations. It added Rosemary McAllister to its fleet of tugs providing escort and manoeuvring services on the US east coast in May 2018.
This is the second of a series of four environmental tractor tugs that surpass the tough US Environmental Protection Agency’s Tier 4 and IMO Tier III emission regulations. These tugs were ordered from Horizon Shipbuilding in 2016 with requirements to lower emissions of sulphur and nitrogen oxides and particulates.
The first of these tugs, Capt Brian A McAllister, was built by Horizon at its facility in Bayou La Batre in Alabama and delivered in 2017. Rosemary McAllister was completed and delivered to McAllister at the end of May as a sister tug. Two more are on order for delivery in Q4 2018 and into 2019.
Rosemary McAllister started operations in June supporting McAllister Towing’s operations in Virginia, where the new generation of ultra-large container ships have been delivering cargo to expanded ports. This 30.5-m tug has a bollard pull of more than 80 tonnes.
McAllister vice president and general manager Elliott Westall said Rosemary McAllister had already made a huge difference to towage capabilities in the Hampton Roads area of Virginia. “We have seen a major increase in the arrival of ultra-large container vessels, and this tug, with its power, is able to expertly handle the largest vessels in the market today,” he said.
“With its tethered escort abilities, Rosemary McAllister is a real game-changer”
It is not just its power that influences container ship handling though. “With its tethered escort abilities, Rosemary McAllister is a real game-changer,” said Capt Westall. “Bring on the 450-m container ships, McAllister and our team are ready!”
Rosemary McAllister is classed by ABS as an escort, ship-docking and rescue tug with fire-fighting FiFi1 capabilities. During sea trials it achieved a bollard pull of 82.5 tonnes through using a pair of 3516E Tier IV Caterpillar engines, which combined generate 5,050 kW of power and drive two Schottel SRP 4000 fixed Rudderpropeller units.
Each 3516E engine is paired with a selective catalytic reduction after-treatment system for removing NOx. Also in the engineroom there are CAT C7.1 Tier 3 gensets rated at 118 kW and two CAT C18 Tier 3 fire pump engines.
Beier Integrated Systems supplied the switchgear for this series of McAllister tugs. They were custom-built consoles to meet McAllister’s requirements. On the deck Rosemary McAllister has a Markey class III escort winch on the bow and a Markey 57 mm wire towing winch on the stern.
Rosemary McAllister expands McAllister’s tug fleet to 32 vessels. It is named after the matriarch of the company, Rosemary, the wife of chairman Brian McAllister, and mother of president Buckley McAllister and chief financial officer Eric McAllister.
Rosemary McAllister particulars
Type: Escort tractor tug
Owner: McAllister Towing
Builder: Horizon Shipbuilding
Operations: Virginia, US
Environmental: EPA Tier 4/IMO Tier III
Length: 30.5 m
Breadth: 12.2 m
Bollard pull: 82.5 tonnes
Main engines: 2 x Cat 3516E Tier IV
Propulsion: 2 x Schottel SRP 4000FP
Gensets: 2 x CAT C7.1 Tier 3
Deck machinery: Markey class III escort winch (bow) and wire towing winch (stern)