Sea Patrol is an Australian television drama that ran from 2007 to 2011, set on board HMAS Hammersley, a fictional patrol boat of the Royal Australian Navy (RAN). The series focused on the ship and the lives of its crew members.

The Fremantle-class patrol boats were coastal patrol vessels operated by the Royal Australian Navy (RAN) from 1979 to 2007. Designed by British shipbuilder Brooke Marine and constructed in Australia by NQEA, the Fremantle class were larger, more powerful, and more capable than the preceding Attack class, and the two primary patrol boat bases required infrastructure upgrades to support them. Although up to 30 vessels were planned, fifteen were ordered and constructed, with an unexercised option for five more.