Typically, when marine security teams deploy onboard a vessel, they take a RockSTAR device with them. Before the start of the transit the unit is turned on and will start transmitting a position fix once per hour (or whatever the customer chooses).
Back at HQ, the customer uses The Core management system to monitor the positions of all their teams/vessels.
In the case of an emergency, the RockSTAR unit can alert HQ, using either the dedicated red button or, even better, the messaging facilities to indicate the type of alert and any other relevant details.