The term "vessel engaged in fishing" means any vessel fishing with nets, lines, trawls, or other fishing apparatus which restrict maneuverability, but does not include a vessel fishing with trolling lines or other fishing apparatus which do not restrict maneuverability.

The term "vessel not under command" means a vessel which through some exceptional circumstance is unable to maneuver as required by these Rules and is therefore unable to keep out of the way of another vessel.

Two vessels: left - "I intend to overtake you on your starboard side"; right - "Yes ( _ . _ . )" or indicate such doubt by giving at least five short and rapid blasts on the whistle or flashes.