相关题目
"()is the most visible signal of distress from a lifeboat at sea in the daytime.
"The generators on your rig have shut down，leaving you without navigation lights. Which emergency signal would you transmit over the VHF radio to alert vessels in the area of your predicament? ()
"A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as().
"The Class A EPIRB transmits a signal ().
"If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens?
"You are using VHF channel 16 (156. 8 mHz) or 2182 kHz. You need help but are not in danger. You should use the urgent signal().
" You are proceeding to a distress site. The survivors are in liferafts. What will make your ship more visible to the survivors? ().
"You are preparing to contain an oil spill. You must first receive approval from the Federal On-Scene Coordinator (OSC) prior to ().
"Which statement concerning locating signals in the GMDSS is FALSE?()
"A buoy marking a wreck will show a(an)（）.
