(2)Overtaking vessels(a)Two prolonged blasts (blast of about 4 to 6 seconds duration each) followed by one short blast to indicate " I intend to over take you on your starboard side."(b)Two prolonged blasts followed by two short blasts to indicate "I intend to over take you on your port side."(c)A vessel being overtaken shall indicate her agreement by the following signals or her whistle; one prolonged, one short, one prolonged, one short blast, on that order, if in doubt she may sound signals prescribed in paragraph (3)
