AU9-D 40m Diver Alert Unit/Personal Locator Beacon (LIVE 121.5 MHz 500mW). When a diver carrying a AU9 Personal Alert Unit (also called Personal Locator Beacon - PLB) fitted to a Surface Market Buoy (SMB) drift from its dive plan or gets into difficulty, he deploys his AU9-D to signal a distress. A Base Unit can pick up its signal and automatically activate a Dive/MOB alarm whilst simultaneously plotting the position of the vessel using an on-board NMEA connected GPS unit. The Base Unit will show direction and range to the diver which enables crew to easily steer back to the MOB location and track, find and recover the diver(s).

• 121.5Mhz transmit frequency
• 500mW transmit power
• 5 second auto-activation (upon continuous immersion) or manual activation
• LED strobe on antenna
• Automatic low battery warning indicator
• 100mW power output version optionally available
• Approvals – CE, FCC-YFGAU9
• User replaceable battery (PLB)
• Range: 2-3 miles from a ship/jetty/platform to a drifting person, 15-17 miles to an aircraft/helicopter at 1,000ft, 35 miles or more to an aircraft at high altitude (depending on antenna height and life-jacket PLB fitting)