Oh, hell, that's easy. If you are cruising at 2000' or so above the water, keep
the shore at an apparent twice your distance above the water. 5000' above, keep
it as far away as you are above the water.
And so on.
Jim
Bob Webster
shared these priceless pearls of wisdom:
-I had a curious assignment by Daytona Approach 2-3 weeks ago. They said
-to stay 1/2 mile offshore. I had no clue how far that was, other than by
-guessing on the GPS map. So I stayed clear of their Class C.
Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com