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Originally Posted by Misty Blue
Mee-n-Mac. The above is the answer to your question. If Captain Bonehead is on your port side and turns to port, if collision is imminent you Gota.....
If the Stockholm had not maintained course and speed the Andria Doria would be sunning folks in the Carib. today! Well, maybe not.
Misty Blue
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Yup, really not rocket science here. I was trying to illustrate the case where a boater would be on the dividing line between two opposing courses

of action. For QQ#2 it was the case of deciding between being the stand-on vessel in a crossing situation and being the give-way vessel in an overtaking situation (where 22.5 deg aft of beam is the demarkation between crossing and overtaking). In real life it can be hard to know just what your angle is with respect to the other vessel. COLREGs require you assume you're the overtaking/give-way vessel whenever the situation is not clear, which for the pleasure craft we use on the lake is also the common-sense thing to do.
One other thing, perhaps more inline with what SD may have intended, is what else (other that reducing speed) would you do. Normally I like to indicate my intentions to give-way in a crossing situation by a deliberative turn to starboard (so that my new course is aft of the other vessel) that almost instantly can be recognized by the stand-on vessel. It's quicker, easier to recognize that a collision has been avoided than by simply slowing alone ... which leads my to ask if everyone knows how to tell when you're on a collision course. Perhaps there are some boating newbies that haven't learned that yet ??