Built in 1963 by Albina Engine and Machine Works at Portland, Oregon as the Mahoe II (hull #361) for the Hawaiian Tug and Barge Company of Honolulu, Hawaii. A subsidiary of the Dillingham Corporation of Honolulu, Hawaii.

In 1977, the company's corporate name was changed to the Dillingham Tug and Barge Corporation of Honolulu, Hawaii.

In 1986, the Dillingham Corporation shed its maritime assets in favor of real estate investment, with Dillingham Tug and Barge and Young Brothers being acquired by Hawaiian Electric Industries Incorporated (HEI) of Honolulu, Hawaii. At this time, Dillingham Tug and Barge's corporate name was reverted back to Hawaiian Tug and Barge.

The tug was later acquired by Marin Tug and Barge Incorporated of San Rafael, California. Where she was renamed as the Marin Sunshine.

In 2008, she was acquired by Marine Express Incorporated of Alameda, California. Where the tug retained her name.

Her powerplant consists of two CAT C32 diesels turning twin screws. For a rated 2,000 horsepower.