Tugboats

thumb|upright=1.35|Tugboat CSS Teaser|CSS Teaser is captured by USS Maratanza. thumb|Justine McAllister, a tug boat in New York Harbor, January 2008 thumb|The tugboats Reid McAllister and McAllister Responder push the LPG tanker BW Volans into port at Marcus Hook on the Delaware River.

marine propulsion system

first Confederate ironclad warship

specialized type of tugboat

ship built in 2006

scuttled tugboat in Malta