单选题An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.AI am altering my course to starboardBI am altering my course to portCI am operating astern propulsionDMy vessel is stopped and making no way through the water
单选题
An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
A
I am altering my course to starboard
B
I am altering my course to port
C
I am operating astern propulsion
D
My vessel is stopped and making no way through the water
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