What is the all-round shape/light combination a vessel of less than 20m engaged in trawling must show by day and by night, under Rule 26?

A. No specific shapes or lights are required for trawling vessels under 20m

B. A single black ball shown forward, both day and night, regardless of vessel size or activity

C. Two red lights in a vertical line, both day and night

D. By day, two cones with apices together (one above the other) where they can best be seen; by night, a tricolour light or all-round green light over white light (a steaming light and sidelights/sternlight may be required depending on length/activity); the precise combination depends on vessel length and whether making way

A. Only vessels actively trawling; vessels using static gear like pots or lines are excluded entirely

B. Any vessel licensed for commercial fishing, whether gear is in use or not

C. Any vessel carrying fishing gear of any kind, regardless of whether it is currently deployed

D. Any vessel fishing with nets, lines, trawls, or other fishing apparatus that RESTRICTS HER MANOEUVRABILITY — a vessel fishing with trolling lines or other gear that does not restrict manoeuvrability is NOT "engaged in fishing" for Rule purposes

A. A power-driven vessel underway shall keep out of the way of a vessel engaged in fishing — fishing vessels rank above ordinary power-driven and sailing vessels, but below vessels not under command, restricted in their ability to manoeuvre, and (depending on circumstances) vessels constrained by draught

B. Fishing vessels have no special standing under Rule 18 and are treated as ordinary power-driven vessels

C. A fishing vessel must always give way to a power-driven vessel underway, regardless of gear deployment

D. Fishing vessels rank above all other vessel categories with no exceptions