Question 591 Rules of the Road

The correct answer is A) 1 second. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a "short blast" on the whistle is defined as a signal lasting approximately 1 second in duration. This is the standard duration for a short blast, as specified in the regulations governing navigational whistle signals. The other options are incorrect because a "short blast" is not 4-6 seconds (B), 8-12 seconds (C), or 12-15 seconds (D) in duration. These longer durations do not align with the regulatory definition of a short blast.