ALARM SYSTEMS FOR MARINE USE, COMPRISING - COMPUTER PERIPHERALS; CONTROLLERS; PROGRAMMABLE ALARMS; SIRENS; WARNING LIGHTS; STROBE LIGHTS; PERIMETER SECURITY APPARATUS; APPARATUS FOR MONITORING ENGINE OIL AND WATER FLOW, TEMPERATURE AND LEVEL; SMOKE AND HIGH TEMPERATURE DETECTORS; AUTOMATIC DIALING APPARATUS; APPARATUS FOR MONITORING BILGE WATER LEVELS; MAGNETIC CONTACTS; PRESSURE CONTACTS; SHOCK SENSORS; AND INSTRUCTION MANUALS SOLD THEREWITH