When Vessel A is underway pushing ahead and sighting Vessel B off the starboard bow, which statement is true?

When Vessel A is underway and pushing ahead while sighting Vessel B off the starboard bow, Vessel A is considered to be in a situation where it must yield to Vessel B. This is because under the Navigation Rules, when two power-driven vessels are approaching one another, the vessel that has the other on its starboard side (in this case, Vessel B) is the stand-on vessel.

The stand-on vessel is expected to maintain course and speed, while the give-way vessel (Vessel A) is required to take action to avoid a collision. Since Vessel A sees Vessel B off its starboard side, it confirms that Vessel A is the give-way vessel, making the statement that Vessel B is the stand-on vessel accurate.

This understanding of the roles of the vessels in this scenario derives from the rules governing maritime navigation, which prioritize safety and help prevent collisions at sea. Therefore, the identification of Vessel B as the stand-on vessel is correct and essential for safe navigation practices.