A.Snowfall or blowing snow
B.Lack of ability to estimate distance
C.Harsh contrast between sun-illuminated snow cover and the background
D.Hazy horizons with extensive mirage effects
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最新試題
Fire may be spread by which means?（）
Each OSV must carry（）.
Each EPIRB required on an OSV shall be tested using the integrated test circuit and output indicator every（）.
Each fire hose coupling on a ship must have threads that meet the specifications of the（）.
Each fire pump on a tanker must have a pressure gauge located at（）.
Foam-type portable fire extinguishers are most useful in combating fires involving（）.
During transfer operations，a quantity of propylamine spills on deck. According to the Chemical Data Guide，the correct procedure would be to（）.
Each hose used for transferring vapors must（）.
Fire extinguishers used on ship’s are numbered by size I through V，with I being（）.
Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.