Hydrostatic hook kit compatible with MT-401FF, MT-403FF and MT-403FG.
It is the device that allows the EPIRB to be activated automatically, in fact, once in contact with water, as soon as it reaches a depth ranging from 2 meters to 6 meters, the hydrostatic hook is activated and jumps the EPIRB. out of its wrapping which will automatically start sending the distress message.
The hydrostatic hook must necessarily be replaced 2 years after its installation.