Art. 15.—If two ships, one of which is a sailing-ship and the other a steamship, are proceeding in such directions as to involve risk of collision, the steamship shall keep out of the way of the sailing-ship.
SHIPS UNDER STEAM TO SLACK SPEED.
Art. 16.—Every steamship, when approaching another ship so as to involve risk of collision, shall slacken her speed, or, if necessary, stop and reverse; and every steamship shall, when in a fog, go at a moderate speed.
VESSELS OVERTAKING OTHER VESSELS.
Art. 17.—Every vessel overtaking any other vessel shall keep out of the way of the said last-mentioned vessel.
CONSTRUCTION OF ARTICLES 12, 15, AND 17.
Art. 18.—When, by the above rules, one of two ships is to keep out of the way, the other shall keep her course, subject to the qualifications contained in the following article:—
PROVISO TO SAVE SPECIAL CASES.
Art. 19.—In obeying and construing these rules, due regard must be had to all dangers of navigation, and due regard must also be had to any special circumstances which may exist in any particular case, rendering a departure from the above rules necessary in order to avoid immediate danger.