AP1.2 Message & Signal Transfer
AP1-15
AP1.2.3 Log in/Log out
Each time the DTE and Communication Unit are turned on, the vessel should be
registered with the Inmarsat C system to enable communications between vessel and
LES. This is called login.
If the vessel is not going to be using the equipment for a prolonged period it should
logout from the Inmarsat C system so the vessel can be registered as inactive.
Log in
Fig. AP1.2.3 Log in flow
Log out
Fig. AP1.2.4 Log out flow