INLAND ONLY Two power driven vessels, "A" and "B" , are meeting in a narrow channel as shown in illustration D029RR below. Which statement is TRUE concerning whistle signals between the vessels?

Correct Answer: Option D — Both vessels should sound two short blasts.

Inland Rules for narrow channels on the Great Lakes and Western Rivers require vessels meeting port-to-port to signal. However, when meeting in winding channels with a current, downbound vessels with a fair current dictate terms; two short blasts indicate a starboard-to-starboard passage agreed upon by the local rules.