Question 33D1

COSPAS-SARSAT satellites primarily act as relays. They receive distress signals from EPIRBs, time-tag the data, and re-transmit it to ground stations called Local User Terminals (LUTs). * **A is correct** because satellites do not *provide follow-on* after a position is calculated. The actual position calculation from Doppler shift data is performed by ground stations (Mission Control Centers - MCCs). Subsequent search and rescue (SAR) coordination is initiated by these ground systems, not directly by the satellites. * **B is incorrect** because the relayed message *does* include the unique EPIRB ID, which is crucial for identifying the vessel and coordinating rescue efforts. * **C is incorrect** because measuring the Doppler shift of the EPIRB signal is fundamental to the system's ability to calculate the beacon's position, a core function facilitated by the satellite's movement relative to the EPIRB. * **D is incorrect** because the satellite *does* time-tag the received information and transmits it to any available Local User Terminal within its coverage area for processing.