You are monitoring VHF Channel 16 when you receive a call to your vessel，TEXAS PRIDE．What
A. This is TEXAS PRIDE．Pick a channel
B. This is TEXAS PRIDE on Channel 16．Come back
C. This is TEXAS PRIDE，WSR 1234，reply Channel 10
D. Please stand by．We're busy right now
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Whipping the bitter end of a fiber rope ______．
A. increases the circumference of the rope
B. makes for easier handling
C. prevents fraying of the bitter end
D. prevents moisture from entering the bitter end
Loran-C is which type of navigation system ________．
A. Hyperbolic，long-range navigation system
B. Short-range electronic
C. Long-range，high frequency navigation system
D. Long-range，with a frequency of 1950 kHz
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．
A. Forming a cloud cover over the flames
B. Directing the gas at the base of the flames in a slow sweeping motion
C. Discharging the carbon dioxide into the heart of the flames
D. Bouncing the discharge off an adjacent bulkhead just above the burning surface
What is the most appropriate action for a GMDSS radio operator to take in a distress situation where immediate help is needed，but the vessel is not sinking nor needs to be abandoned ________．
A. Switch off EPIRB and SART manually
B. Transmit distress call by MF/HF，VHF or INMARSAT
C. Notify the RCC（Rescue Coordination Center）through VHF FM on channel 13
D. Transmit distress call by activating the radiotelegraph automatic alarm signal
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