Question 298 Rules of the Road

The correct answer is A) If agreement is reached by radiotelephone whistle signals are optional. This is correct because under the Inland Navigation Rules, if the two power-driven vessels in a narrow channel are able to communicate and reach an agreement by radiotelephone, then the exchange of whistle signals becomes optional. The rules do not require whistle signals to be used if the vessels can coordinate their passing through verbal communication. The other answer choices are incorrect because B) and C) state that whistle signals must be exchanged, which is not the case if an agreement is reached by radiotelephone. Option D) is not correct since A) is the right answer.