. Which of the following is true'? A: . a compulsory VHF-DSC radiotelephone installation must be daily tested without radiation. B: a compulsory VHF-DSC radiotelephone installation must be annually tested without radiation C: a compulsory VHF-DSC radiotelephone installation must be monthly tested without radiation. D: a compulsory VHF-DSC radiotelephone installation must be weeklv tested without radiation.

70. If you are transmitting a distress message by radiotelephone, you should ____.

159. If you receive the signal over radiotelephone of Romeo Papa Tango while using the

111which radio equipment is not necessary for the ships sailing inthe sea area Al? A: MF DSC. B: Enhanced group calling receiver. , C: Satellite EPIRB. D: VHF radiotelephone.

The date and time kept in the radiotelephone log shall commence at（）. A: Amidnight B: Bnoon C: Cbeginning of the watch D: Dany convenient time

The radiotelephone safety signal is（）. A: securite repeated 3 times B: safety repeated 3 times C: pan pan repeated 3 times D: securite securite repeated 3 time