The goal is to comibe the 2 complementry distress function inside one compact and waterproof hardware so that it can be intergrated into a compact life-vst for marine safety of sailors. Syilinks will then be the first beacon supplier in the world to propose this fuction providing: PLB 1G + RLS: the ultimate alert, in all locations (satellite distress) AIS-MOB: the proximity alter at sea, quick rescue from nearby vessels altered on their AIS receivers.