A vessel constrained by her draught shall，when risk of collision with another vessel in a crossing or head-on situation exists，（）.
A. apply the relevant Steering and Sailing Rules as a power-driven vessel
B. apply the relevant Steering and Sailing Rules as a Sailing vessel
C. apply the relevant Steering and Sailing Rules as a vessel not under command
D. apply the relevant Steering and Sailing Rules as a vessel engaged in a towing operatio
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