Rule 17 of the COLREGs stipulates the direction of action of the stand-on vessel in a crossing situation. The stand-on vessel should not alter to port in a crossing situation if the situation allows. However, other stand-on vessels should take the most effective collision-avoidance actions as...
According to rule 17, the OS must take the most effective action to avoid a collision in this stage, as the collision cannot be avoided by the action of a vessel alone. A substantial turn (90◦ or more in the course control system circumstance) must be taken in the most effective ...