________is the most visible signal of distress from a lifeboat at sea in the daytime.
A.Smoke signal
B.Flash signal
C.Fire signal
D.Radio emergency transmission
第1题:
keep the propeller from being fouled
increase propeller speed
help calm the waves in the vicinity of the craft
increase the holding power of the sea anchor
第2题:
an approach from leeward
an approach from windward
the most direct approach
an approach across the wind
第3题:
Smoke signal
Flash signal
Fire signal
Radio emergency transmission
第4题:
red star shell
searchlight
burning barrel
orange smoke signal
第5题:
A continuous sounding with any fog signal apparatus
A signal sent by radiotelephone consisting of the spoken word Mayday
An International Code Signal of N.C.
The firing of green star rockets or shells
第6题:
A triangular flag above or below a ball
The International Code Signal of distress indicated by JV
A green smoke signal
Flames on the vessel as from a burning tar barrel
第7题:
Directing the beam of a searchlight at another vessel
A smoke signal giving off orange colored smoke
A whistle signal of one prolonged and three short blasts
International Code Signal PAN spoken over the radiotelephone
第8题:
The marine sextant
The chronometer
The echo sounder
The radar
第9题:
consists of 5 or more short blasts of the fog signal apparatus
consists of the raising and lowering of a large white flag
may be used individually or in conjunction with other distress signals
is used to indicate doubt about another vessel's intentions
第10题:
before the boat is lowered from the stowed position
as the boat fall blocks break clear of the davit head
before the boat is lowered from the embarkation level
after the boat is released into the water
第11题:
A continuous sounding of the fog horn
Firing a gun every minute
Five or more short rapid blasts on the whistle
A square flag and ball flown from the mast
第12题:
capsize
run smoother
run faster
sink
第13题:
will be coming to periscope depth
will be coming to the surface
is on the bottom in distress
is in distress and will try to surface
第14题:
general radio communication
MSI
improved distress and safety communication
bridge-to-bridge communication
第15题:
Signal absorption by the ionosphere
Heavy sea swells
The rescue personnel were monitoring the 10-cm radar
The rescue personnel were monitoring the 3-cm radar
第16题:
Sound one blast of the whistle
Alter course to starboard
Construct a radar plot
Sound the danger signal
第17题:
consists of 5 or more short blasts of the fog signal apparatus
consists of the raising and lowering of a large white flag
may be used separately or with other distress signals
is used to indicate doubt about another vessel's intentions
第18题:
MAYDAY sent by radiotelephone
Continuous sounding of fog horn
Green star shells fired from a launcher
Square flag and ball in a vertical line
第19题:
COSPAS-SARSAT
Ground receiving stations
storing distress signal
Near-polar orbiting satellites
第20题:
Distress alert
Safety alert
Emergency alert
General alert
第21题:
A continuous sounding with any fog signal apparatus
A signal sent by radiotelephone consisting of the spoken word Mayday
An International Code Signal of N.C
The firing of green star rockets or shells
第22题:
COSPAS-SARSAT
ground receiving stations
storing distress signal
Near polar orbiting satellites
第23题:
COSPAS-SARSAT
ground receiving stations
spacecraft
satellite SAR instrument