USCG 173 BOTH INTERNATIONAL & INLAND: Understanding "Special Circumstances"

What would be considered a "special circumstance" under the USCG 173 Rules?

A. Speed in fog

B. More than two vessels crossing

C. Two vessels meeting

D. Vessel at anchor

Final answer: A "special circumstance" under the USCG 173 Rules refers to a situation that deviates from the standard rules of navigation.

A "special circumstance" under the USCG 173 Rules refers to a situation that deviates from the standard rules of navigation. It is an exceptional condition that requires specific actions or considerations.

For example, if a vessel is operating at high speed in foggy conditions (option A), it would be considered a special circumstance because it poses a higher risk for collisions and requires additional precautions. On the other hand, options B and C (more than two vessels crossing and two vessels meeting) are not typically considered special circumstances as they fall under the normal rules for encounters with other vessels.

Lastly, a vessel at anchor (option D) is also not a special circumstance as it is governed by its own set of rules related to anchored vessels.