Ok, just to set the record straight: 100yds = 300 ft = 1 football (American) field = a bit less than 100m.... BUT - my ability to judge such things is abysmally poor. I know my OW Instructor mentioned about counting kick cycles and such, but never really got into it. Also, when swimming against or with current or surf, that changes. I'm a new diver and looking to do more shore dives, and all the descriptions discuss how far out to swim before getting to the reef/ledge/wreck. Since I have no good sense of distances, I was wondering if there are any good pointers or 'tricks' that can be shared.