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POR is the Pacific Ocean Region. This region is one of the four Inmarsat satellite coverage areas


Point of Service Activation. The PSA is an entity that has concluded a contract with Inmarsat for the activation and maintenance of records and accounts of Inmarsat terminals. A PSA in some cases can be a one-stop shop for service activation, terminal equipment provision and customer support.


Press To Transmit - PTT or “PRESSEL” switch is usually mounted on one side of the microphone or in the middle of the handgrip of a telephone style handset connected to the marine radio communication equipment. To operate correctly, you have to press it in order to switch the radio from receive mode to transmit mode and release it in order to revert to receive mode.