Built in 1981, by Sanchez Marine Services of Fall River, Massachusetts (hull #8006) as the Osprey for the Allied Transportation Company of Norfolk, Virginia.
In 2003, the tug was acquired Sirius Maritime of Seattle, Washington. A division of Hawaiian InterIsland Towing of Honolulu, Hawaii. Where she was renamed as the Altair.
In 2006, Sirius Maritime was acquired by K-Sea Transportation Partnership of East Brunswick, New Jersey. Where the tug retained her name.
In 2011, the K-Sea Transportation Partnership was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
She is a twin screw tug, rated at 3,600 horsepower.
(Harold E. Tartell, Robert P. Hill, Birk Thomas)