McMurdo

Marine safety beacons and distress signaling devices are used to alert rescue services of your exact location during an emergency at sea, using satellite and GPS technology to transmit your position automatically. Some devices also integrate with AIS networks so nearby vessels can see your distress signal in real time.

Personal locator beacons are designed for anyone who spends time on the water in remote or offshore environments, including sailors, fishermen, kayakers, and recreational boaters. Anyone venturing beyond reliable cell coverage or VHF radio range should carry one as a last-resort emergency device.

Register your personal locator beacon with the national authority in your country — in the United States, that is NOAA — by submitting your beacon's unique 15-digit hex ID along with your contact and vessel information. Registration is free, mandatory in most countries, and ensures rescue coordinators can reach someone who knows your trip plan.

An EPIRB is a vessel-mounted emergency beacon designed to alert rescue services when a boat is in distress, while a personal locator beacon is a smaller, handheld device worn or carried by an individual. EPIRBs are typically required safety equipment on commercial and offshore vessels, whereas personal locator beacons are used by individual crew members or solo adventurers.

An AIS system works by continuously broadcasting your vessel's position, speed, and heading to other AIS-equipped boats and shore stations using VHF radio frequencies. Class B transponders are the most common option for recreational vessels, transmitting and receiving traffic data to help prevent collisions and improve situational awareness.

Yes, a hydrostatic release unit is strongly recommended and often required for Category 1 EPIRBs, which are designed to float free and activate automatically if a vessel sinks. The hydrostatic release unit holds the EPIRB in its bracket and releases it at a preset water depth, so the beacon deploys even if the crew cannot reach it.

Most marine safety beacons and EPIRBs have battery and registration expiration dates that range from four to ten years depending on the model, and the beacon must be serviced or replaced when the battery expires. Always check the expiration date printed on your device and factor battery life into your purchase decision, especially if you want a longer service window before replacement.

Yes, a handheld VHF radio can serve as a critical backup communication tool alongside an EPIRB or AIS system, allowing you to make voice contact with rescue services or nearby vessels on distress channels. However, a VHF radio does not replace an EPIRB or personal locator beacon because it requires someone to be listening and does not automatically transmit your GPS coordinates to a rescue satellite network.

When choosing between an AIS receiver and an AIS transponder, consider whether you need to only see other vessels or also broadcast your own position to them. A receiver lets you monitor surrounding traffic on a chartplotter, while a transponder both receives and transmits your vessel data, making your boat visible to other AIS-equipped ships and coast guard stations.

Store marine safety beacons in a cool, dry location away from direct sunlight and extreme temperatures, and inspect them regularly for physical damage, corroded contacts, or expired battery dates. Follow the manufacturer's service schedule, keep registration information current, and perform a self-test function if the device supports one to confirm the beacon is operational before each voyage.