Explanation: The COSPAS-SARSAT system, while highly effective, does not provide "instantaneous" notification to the Rescue Coordination Center (RCC). An EPIRB signal is first detected by satellites, relayed to ground receiving stations, processed by a Mission Control Center (MCC), and then analyzed. The MCC determines the beacon's position (often using Doppler shift or an internal GPS receiver in the EPIRB) and identifies the vessel via its unique Hex I.D. Only after this processing and verification, including attempts to rule out inadvertent activation, is the distress information forwarded to the appropriate RCC. This multi-step process introduces a necessary time delay. Statements A, B, and D are true: * **A) The EPIRB’s position is calculated by the system and passed to the MCC.** This is correct; the COSPAS-SARSAT system (ground stations and MCC) calculates or processes the position. * **B) The EPIRB transmits a unique Hex I.D. and vessel position that may be passed to the RCC.** Correct; modern 406 MHz EPIRBs transmit both, and this data goes to the RCC. * **D) The EPIRB transmits a unique Hex I.D. that is passed to the RCC if it cannot be determined to be inadvertent.** Correct; the MCC's role includes filtering false alarms, but if a distress cannot be ruled out, the ID is passed on.