25. 依規定何種GMDSS通信系統，其地面設施必須有LUT、MCC、RCC等三個部分組成？ (A) INMARSAT (B) COSPAS-SARSAT (C) GPS (D) GLONASS

31. “Running Fix” position was obtained by: (A) two lines of position that are obtained at same time (B) two lines of position that are obtained at different time (C) one line of position and one estimate position at the same time (D) one line of position and one assume position (AP) at the same time