Guardian is a fireboat that was owned by San Francisco Fire Department from 1990 until December, 2022.

Guardian was a gift to the people of San Francisco by anonymous donors following the notable role of the fireboat Phoenix in helping to save the Marina District buildings from further destruction by fire following the 1989 Loma Prieta earthquake.

She is anticipated to be ready for charters and events once proper restoration and refitting to safely transport passengers is complete.

Guardian is also being prepared for use as an on-water fireboat training facility for the West Coast.

Firehouse 35 on Pier 22½ has seven crew on duty at all times: four to serve Engine #35, and three dedicated to the two fireboats.