| Man Overboard Systems Sea Marshall are UK based developers of man overboard systems, maritime survivor locating devices and man over board alarm systems. Sea Marshall® ‘SOS’ man overboard systems, man over board systems / Maritime Survivor Locating Devices… MOB Alerting Units (Personal Locator Beacons) and Base Units MOB Alarm Only and Alarms with Locating Function (MOB Radio Direction Finders). http://www.seamarshall.com - Read more | | |