Vagabond Voyagesvideo
AIS: Essential at sea? Our experience after a major scare
May 10, 2026 · 23 min · 8K views
What this video covers
An AIS transponder provides critical collision avoidance data by broadcasting a vessel's position, speed, and heading while receiving the same information from other nearby ships.▶ 3:41 After a near-collision with a cargo ship during a previous passage, the owners of a cruising sailboat replaced a faulty, legacy Trueheading AIS unit with a modern, compact Trueheading transponder.▶ 1:19 The new unit features an integrated antenna splitter, allowing the use of the existing VHF antenna for both radio and AIS communications.▶ 6:41 It utilizes SOTMA technology to transmit data every five seconds, offering higher performance than standard Class B transponders.▶ 7:04 Installation involved connecting power, NMEA data cables to the chartplotter, the VHF antenna, and a dedicated GPS antenna.▶ 11:35 Configuration was completed via a laptop using the ProAIS2 software to input the vessel's MMSI number, call sign, and antenna position.▶ 18:28 The system integrates with Navionics via a Simrad Wi-Fi network to display traffic on an iPad.▶ 19:49 Despite the added safety, the crew maintains that AIS does not replace the need for a radar or a dedicated night watch.▶ 10:01
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