There are various means available for small vessels to communicate distress to search and rescue (SAR) authorities; each method has different capabilities that are outlined in general below. It is important to note that relying on a single means of communication can be problematic because distress equipment may fail, become damaged, or become inaccessible in an emergency.
On 10 June 2024, the sailing vessel Theros departed Halifax Harbour, Nova Scotia, with two people on board for a two-to-three-week voyage to the Azores, Portugal. The vessel was fitted with a Class B automatic identification system (AIS) that was automatically transmitting the vessel’s position to nearby vessels and shore receivers, in addition to AIS satellites.
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