霧中においては、一般航法(海上衝突予防法17条〜27条)の適用はない(日本航海学会第22回講演会)

抄録

We should not apply Steering and Sailing Rules (Article 17〜Article 27 in Prevention Collision) in any vessels in fog, heavy rain-storms & etc, for the vessels must be in sight of one another. A power-driven vessel must avert collision with another vessel only by the rule that is prescribed "navigate with caution until danger of collision is over" in Article 16 (b), not only when a vessel could not ascertain the possition of another vessel but also ascertained it by hearing her fog-signal.