Question 7
GLI08BOTH INTERNATIONAL & INLAND A vessel is exhibiting the lights shown in illustration D082RR below. Which can you conclude about the vessel?

AI Explanation
The Correct Answer is B
***
### Explanation for Option B (it is a fishing vessel)
Option B is correct because the light configuration described (implied by the illustration linked to this question, which depicts an all-round green light vertically above an all-round white light) is the specific signal required for a vessel engaged in fishing under the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 26.
* **Rule 26 (Fishing Vessels):** A vessel engaged in fishing shall exhibit two all-round lights in a vertical line, the upper being green and the lower white.
This combination (Green over White) positively identifies the vessel as one currently engaged in fishing operations.
***
### Explanations for Incorrect Options
**A) it is a pilot boat on duty**
A vessel engaged in pilotage duty (Rule 29) must display an all-round **white** light vertically above an all-round **red** light ("White over Red, Pilot Ahead"). This differs from the green over white signal shown.
**C) it is a sailing vessel**
A sailing vessel (Rule 25) shows only sidelights and a stern light. Optionally, it may display two all-round lights in a vertical line, the upper being **red** and the lower being **green** ("Red over Green, Sailing Machine"). This is not the green over white signal.
**D) it is a trawling vessel**
Trawling is a specific *method* of fishing. While a trawler *is* a fishing vessel, the light signal (Green over White) is the standard signal required for **any** vessel engaged in fishing, regardless of the gear used (trawl, nets, lines, etc.). Therefore, the broadest and most accurate conclusion drawn directly from the lights is that the vessel is a "fishing vessel" (Option B).