Built in 1970, by Adelaide Ship Construction LTD. of Australia as the tug Warrawee-12/70.
The tug originally performed light duty as an escort tug at an oil terminal and worked world wide for various Owners.
She was later sold and renamed as the Seaspan Raider-76, then as the Raider-87, then as the Raider IV-87, then as the Alice A., and then as the William J. Moore.
At one time she was dubbed as the largest and highest horsepower tug in the Australian fleet.
In 2002, she was fitted with a Bludworth designed coupling system and an upper pilothouse with an height of eye of 51(ft) 6(in) from minimum operating draft. The converted tug was married to a converted dry cargo barge named the McLeary's Spirit.
She is powered by two independently turbo charged English Electric Ruston Paxman 12 cylinder diesels total 3,900 horsepower turning two controllable pitch propellers mounted in a Towmaster nozzles fitted with six rudders. Her bollard pull is about 55 metric tons.
In 2007, the unit was acquired by K-Sea Transportation Partnership of East Brunswick, New Jersey where the tug and the barge retained their names.
Although, she is owned by K-Sea Transportation Partnership. The tug retains the same charter she has been on for the last ten years, to Nova Scotia, McKeil and continues to sail under the Canadian Flag.
In 2011, K-Sea Transportation was acquired by the Kirby Corporation of Channelview, Texas, where the tug retained her name.
In 2012, the tug was "Laid Up" Curacao, Canada.