- AIS SART: IMO (International Maritime Organization)-approved, often SOLAS-certified rescue beacon as part of the GMDSS (Global Maritime Distress and Safety System). It transmits a distress signal via AIS, has a range of approximately 3–7 nautical miles, and is directly displayed on AIS chart plotters.
- AIS MOB: Personal rescue beacon. It transmits a distress signal via AIS, has a range of approximately 5–10 nautical miles, and is directly displayed on AIS chart plotters.
- EPIRB: Transmits a satellite distress signal and initiates an international rescue chain (worldwide range).
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