RedactedNarrative: WHILE OPERATING VESSEL 1 AT A CRUISING SPEED, A FIRE STARTED IN THE ENGINE COMPARTMENT. OPERATOR BELIEVES THE HOUSING AROUND THE EXHAUST PIPE CAUGHT FIRE. HALON SYSTEM KICKED ON AND SUPPRESSED THE FIRE. OPERATOR STATED HE USED 2 HAND HELD BC EXTINGUISHERS AS WELL. NO INJURIES.