Vagabond Voyagesvideo

AIS: Essential at sea? Our experience after a major scare

10 May 2026 · 23 min · 9K 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

Watch on YouTube

More from Vagabond Voyages

We didn't expect this in Ambrym! | Sailing Vanuatu. Vlog 137Sept 2026Vanuatu: Teak bungs... then the worst seasickness of my life. Vlog 136Aug 2026Sailing Vanuatu: bad weather, life on board and bread recipe. Vlog 135Aug 2026What to bring when visiting the islands of Vanuatu? vlog 133Aug 2026

From Vagabond Voyages — see the channel’s boat, crew, and every analysed video.

The Sailing Directory Newsletter

One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.

Report an issue