BOTH INTERNATIONAL & INLAND A vessel underway and fishing shall keep out of the way of which vessel?

Correct Answer: Option B — vessel not under command

Rule 18(d) mandates that any vessel other than a vessel not under command or a vessel restricted in her ability to maneuver shall avoid impeding the safe passage of a vessel constrained by her draft. A vessel not under command is higher in the hierarchy of responsibility than a vessel engaged in fishing.