Question 121 Rules of the Road

The correct answer is D) All of the above. The International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules require the use of all three procedures - long-range radar scanning, systematic observation of objects detected by radar, and watching the compass bearing of an approaching vessel - to determine the risk of collision. These methods provide a comprehensive assessment of the situation and help the vessel operator make the appropriate maneuvering decisions to avoid a collision. The other options (A, B, and C) are all part of the overall process for determining risk of collision, but using any one of them alone would be incomplete and not sufficient to fully assess the situation as required by the regulations.