The issues racers and pleasure sailors need to keep in mind is that visibility from the bridge of a LCC or VLCC looking forward over the bow is very limited. The skipper
or pilot cannot see you if you are ahead and less than about 1/2 mile from the bow of the ship. Additionally, trying to to turn or stop a vessel of that size within a mile or two is impossible even at slow speed. Their speed must be maintained to provide maneuverabitilty and they need room to account for other commercial traffic of similar size, windage is a major issue, in major ports
they are many times under the direction of a shoreside master pilotage office who is directing marine
traffic not unlike an air traffic controller.
My advice would be if you are approaching a large commercial vessel from abeam, your are both underway but they seem to be standing still against the horizon, you are on a collision course and should adjust to pass astern. Try and make your intention/course change readily apparent to the larger vessel as soon as you are able. If you elect to cross their bow, you better be absolutely certain you pass at least 1/2 in front of their bow so they can maintain visibility of your position and you better be absolutely certain that there is no possibility of wind
shift or change in wind
velocity while you are performing this maneuver otherwise you may be more than embarrassed! Capt Phil