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Originally Posted by carguy
A football field is 100 yards long betrween the goal lines. 100 yards equals 300 feet. So 150 feet is equal to one-half of a football field. Keep this in mind when trying to honor the 150' rule.
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I find it easier to think in terms of boat lengths. My runabout is 20 feet long, therefore I need to be at least seven and a half boat lengths out to be 150 feet from shore/object/boat. I've also found that I'm pretty good at judging distamce that way: I borrowed a co-worker's rangefinder, used the 'boat length' method, and found I was usually within 10 feet of the actual distance when the distances were between 150 and 300 feet. Beyond that my estimates were usually within 25 to 75 feet out to a distance of almost 1000 feet.