Abstract
Upon the premise that Regulation For Preventing Collision At Sea is the only and important basic law to prevent the ships from colliding at sea, I researched here the relation of the steering and sailing rules to the route, and especially, the significance of the latter in the former, from the raison detre of the ordinary practice of seaman and its effect in Rule 29. As the practical examples, I illustrated the cases of the 4th. and 5th. routes in Kobe Port.
