Built in 1970, by Albina Machine and Engine Works of Portland, Oregon (hull #418) as the Shelley Foss for Foss Maritime of Seattle, Washington.
In 2010, the tug was acquired by the Manson Construction Company of Seattle, Washington. Where she was renamed as the Nancy M.
Shortly after acquisition, she was modified with the addition of bow push knees, to facilitate moving barges and derricks operated by Manson Construction.
In 2020, she was acquired by the Island Tug and Barge Company of Seattle, Washington. Where the tug was renamed as the Island Breeze.
Shortly after acquisition, the tug was modified with the addition of an upper wheelhouse, to facilitate use in pushing loaded gravel barges.
Powered by two, twelve cylinder, Caterpillar D399TA diesel engines. With Lufkin 5.526:1 reduction gears, turning two 84.5(in), fixed pitch propellers in kort nozzles. She is a twin screw tug, rated at 2,250 horsepower.
Her electrical service is provided by one, 115kW and one, 50kW generator sets.
The towing equipment consists of a single drum, Foss towing winch. With two 20 ton hydraulic bow winches, with fairleads.