INLAND ONLY Vessels "A" and "B" are meeting on a river as shown in illustration D041RR below and will pass 1/4 mile apart. Which statement is TRUE?

Correct Answer: Option C — If a passing agreement is reached by radiotelephone, whistle signals are optional.

33 CFR 83.34(h) states that when a passing agreement is reached by radiotelephone, whistle signals are not required. However, if no agreement is reached, the mandatory whistle signals for passing within half a mile must be exchanged as prescribed by the Inland Navigation Rules.