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The Automatic Identity Systems (AIS) being installed aboard commercial vessels and some large yachts provide better collision-avoidance information than even the best ARPA radars. JRC’s latest JHS-182 model is purportedly the most compact Class A (IMO-approved) unit available, starting with the six-inch display/controller pictured. Not shown is the single antenna which houses both GPS and transponder and which ties to a separate connection box with only a coax cable. The $4,195 system will constantly broadcast your ID, course, speed, and much more to all AIS-equipped vessels within VHF range while also collecting their data for monitoring on its own display and on your connected radars or charting systems. Yachts not regulated by the IMO are permitted to carry AIS, but supposedly—and hopefully —less expensive and more suitable Class B units will be available soon.

JRC ( (206) 654-5644. www.jrcamerica.com.

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