The Royal Navy's search and rescue (SAR) unit in Prestwick is the busiest in the UK, official figures show.
HMS Gannet undertook 447 call outs in 2009 - 20% of all UK military SAR operations and 65 more than its previous record of 382 in 2008.
Military officials said the call outs saw assistance given to 378 people.
HMS Gannet's future has been placed in doubt by Ministry of Defence plans to move search and rescue services (SAR) from Prestwick to Glasgow Airport.