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Tug Technology & Business

Tug Technology & Business

US operators unveil Tier 4 tugs

Mon 21 Aug 2017 by Martyn Wingrove

US operators unveil Tier 4 tugs
Capt Brian McAllister is the most powerful tractor tug in McAllister’s fleet

US tug operators are introducing new tugs that meet the US Environmental Protection Agency (EPA) Tier 4 requirements. A recent example of this is McAllister Towing’s new escort and harbour towage tug Capt Brian McAllister. This arrived in August in New York as the first EPA Tier 4 tug to operate on the US East Coast.

It is the first of a series of new buildings and has enhanced ship docking on the US East Coast while improving the environmental footprint of tugs.

Capt Brian McAllister has 80 tonnes of bollard pull and thus is the most powerful tractor tug in McAllister’s fleet. It was built by Horizon Shipbuilding in Alabama with 3516E Tier IV Caterpillar engines. It has twin Schottel SRP4000 fixed propulsion units.

On the deck, Capt Brian McAllister has a Markey class III escort winch on the bow and a Markey 2 1/4" wire winch on the stern. The tug also has fire monitors and deluge systems with an ABS FiFi certificate. This means the tug can also be used for emergency response and rescue operations.

Other operators are building for EPA Tier 4 requirements. Harley Marine has two articulated tug and barges under construction at Conrad Shipyard that will have engines that are compliant with these requirements. In September, Harley ordered two ocean-going tugs from Conrad with EPA Tier 4 compliant engines.

Great Lakes Towing started operating the first tug that operates under the US Coast Guard’s Subchapter M requirements in June. In May, Bay Houston Towing and Suderman & Young Towing ordered tugs from Gulf Island Shipyards with Tier 4 engines.

More information on the activities of North American tug owners will be included in the fourth quarter issue of Tug Technology & Business.

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