Question 892 Rules of the Road

The correct answer is B) One blast, 4 to 6 seconds in duration. This is the correct answer because under both the International Rules of the Road and the Inland Navigation Rules, a vessel that is approaching a bend in the channel where other vessels cannot be seen must sound one prolonged blast of 4 to 6 seconds in duration. This is to alert any vessels that may be approaching from the opposite direction that your vessel is about to round the bend. The other answer choices are incorrect because they do not match the required signal. Three blasts, a continuous blast, or a longer blast duration are not the proper signals for this situation.