Yep AIS. It is required on ALL commercial vessels and works through your VHF and GPS. It is a signal broadcast through the airwaves and your chartplotter and interfaced radars can display the vessels with pinpoint accuracy for you. Also the commercial fisheries industry down here is requires all commercial fishing boats to have one on them as well.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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