INLAND ONLY Power driven vessels "A" and "B" are meeting on a river as shown in illustration D041RR below and will pass about 1/4 mile apart. Which action should the vessels take?

Correct Answer: Option B — The vessels should exchange two blast whistle signals and pass starboard to starboard.

Under Inland Rules 34(a)(1) and 9(h), power-driven vessels meeting on a river and passing within half a mile must exchange two short blasts to indicate a starboard-to-starboard passing agreement when navigating head-on or nearly head-on positions allowing safe clearance.