单选题Which statement is TRUE concerning a vessel equipped with operational radar?（）.AShe must use this equipment to obtain early warning of risk of collisionBThe use of a radar excuses a vessel from the need of a look-outCThe radar equipment is only required to be used in restricted visibilityDThe safe speed of such a vessel will likely be greater than that of vessels without radar
单选题
Which statement is TRUE concerning a vessel equipped with operational radar?（）.
A
She must use this equipment to obtain early warning of risk of collision
B
The use of a radar excuses a vessel from the need of a look-out
C
The radar equipment is only required to be used in restricted visibility
D
The safe speed of such a vessel will likely be greater than that of vessels without radar
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