TOWAGE and marine services company Smit Lamnalco has delivered the fifth tugboat of a five vessel order for work in the Port of Gladstone.

The SL Wiggins Island, an 80 tonne bollard pull terminal support escort tug, is making its way from the Sanmar Shipyard in Turkey to the port, where it is scheduled to join its sister vessels at the beginning of July.

The first of the five tugs, SL Curtis Island, was delivered last December and since then SL Quoin Island, SL Boyne Island and SL Heron Island have been commissioned.

Designed as part of the Robert Allan RAstar 3400 series, with modifications, the Bureau Veritas-classed tugs, are 34 metres long, 14.5 metres wide, have a maximum draft of six metres and have FiFi 1 notation.

Powered by a pair of Wärtsilä 8L26 diesel engines, each developing 2,720 kilowatts at 1,000 revolutions per minute, the tugs have a bollard pull ahead of 86 tonnes, astern of 80 tonnes and a free-running speed of 15 knots.

The vessels are built specially to assist the berthing and manoeuvring of LNG carriers, which Smit Lamanlco said would see one LNG carrier arrive at Gladstone every day for shipments to destinations mostly in Asia.

The vessels are equipped with gas detectors and electric gas tight dampers on all air inlets and outlets. The dampers are remotely controlled by the gas safety system which has two alarm stages – one at 20 per cent lower explosion limit (LEL) and a second at 40% LEL.

Electric deck equipment – towing winches, emergency stop buttons and navigation and outside lights are of explosion-proof design.

Smit Lamnalco pilots, tug captains and about 40 crew had undergone terminal-specific training in a range of different simulated weather states and emergency response scenarios over a two-year period ahead of the commissioning of the tugs.

Ali Gürün, project director at Sanmar Shipyard where the vessels were built, said the company had designed a new user-friendly control system which uses touchscreen technology to control systems on board the vessel, backed up by conventional controls.”

“The towing winches are powered by two 75kW electrical motors driven by separate frequency drives and inverters to provide full redundancy,” Mr Gürün said.