Editing Emergency position-indicating radiobeacon (section)

==Alternative technologies==
There are also other personal devices in the marketplace which do not meet the standard for 406&nbsp;MHz devices.

=== Maritime Survivor Locator Device ===
A Maritime Survivor Locator Device (MSLD) is a [[Man overboard|man-overboard]] locator beacon. In the U.S., rules were established in 2016 in 47 C.F.R. Part 95

MOB devices with [[Digital selective calling|DSC]] or [[Automatic identification system|AIS]] are allocated [[Maritime Mobile Service Identity|MMSI]] numbers in the range 972yyzzzz.

A MSLD may transmit on '''121.500&nbsp;MHz''', or one of these: 156.525&nbsp;MHz, 156.750&nbsp;MHz, 156.800&nbsp;MHz, 156.850&nbsp;MHz, '''161.975&nbsp;MHz, 162.025&nbsp;MHz''' (bold are Canadian-required frequencies). Although sometimes defined in the same standards as the COSPAS-SARSAT beacons, MSLDs can not be detected by that satellite network, and are instead intended only for short-range [[Direction finding]] equipment mounted on the vessel on which the survivor was traveling.

=== AIS SART ===
{{Main|AIS-SART}}
These devices are distinct from traditional SAR radar transponders ([[Search and Rescue Transponder|SART]]), as they transmit AIS messages containing accurate GPS position information and include a [[GPS]] receiver and a transmitter on [[VHF]] [[Automatic Identification System|AIS]] channels, so they show up on ship AIS receivers. They are lightweight and can be used to equip inflatable [[liferaft]]s.

AIS-SART devices are allocated [[Maritime Mobile Service Identity|MMSI]] numbers in the range 970YYxxxx.

=== SEND—Satellite Emergency Notification Device ===
{{Main|Satellite emergency notification device}}
These devices are commonly referred to as SEND (Satellite Emergency Notification Device), and examples include SPOT and inReach.

===APRS===
{{Main|Automatic Packet Reporting System}}
APRS is used by [[amateur radio operator]]s to track positions and send short messages. Most APRS packets contain a [[GPS]] latitude and longitude, so they can be used for both normal and emergency tracking. They also are routed to the Internet, where they are archived for some period of time, and viewable by others. There are several emergency packet types that can indicate distress. Since it is part of the amateur radio service, it costs nothing to transmit on and uses the extensive network, however, one must be a licensed amateur radio operator. There is also no guarantee that an APRS distress packet report would be seen or handled by [[emergency responder]]s. It would have to be seen by an amateur radio operator and forwarded on.