How Mobilarm Man Overboard Systems Work
Sea Marshall 121.5 MHz Maritime Survivor Locating System
Sea Marshall man overboard alerting units transmit a continuous tone on 121.5 MHz which rescuers can detect and track using Mobilarm base units and/or direction finding equipment.
1. Man falls overboard wearing Sea Marshall AU9 alerting unit
2. Alerting unit auto-activates and transmits continuous emergency homing signal on 121.5 MHz*
3. Mobilarm SARfinder base unit on board parent vessel detects emergency signal and raises alarm
4. Crew use SARfinder to track homing signal and locate man overboard*
5. Man overboard is rescued
* 121.5 MHz is the international Search and Rescue (SAR) homing frequency - enables you to request SAR assistance to locate the man overboard if needed. Note however that the COSPAS-SARSAT satellite system ceased to monitor 121.5 MHz on 1 February 2009.
Crewsafe V100 VHF DSC Maritime Survivor Locating Device
The Crewsafe V100 uses VHF marine radio to automatically transmit a localised man overboard distress alert and real-time GPS position of the casualty to VHF DSC and VHF radio receivers in range, including the parent vessel.
Disclaimer:
No system can be 100% fail-safe. Installation faults and operator error will always introduce the possibility of undetected man overboard (MOB) events, as can circumstances and events beyond the equipment's design criteria.
Mobilarm man overboard alarm systems should never be relied on as the only source of MOB notification or response. The vessel's captain and crew must exercise prudence, common sense and good seamanship. Installation and operation of a Mobilarm man overboard alarm system in no way reduces the responsibility of the captain and crew who have the primary responsibility for safety on board the vessel.