Most GPS units have astatement when they are turned on that says...
... not to rely on one source of information. Depending on the unit, many are short on detail, and often locations are wrong.
Off course, I've seen mistakes on paper charts too. An old edition of a popular chart book for the Chesapeake had an entire sheet misnumberd by 1 minute!
Floating markers get moved off station by storms, often by hundreds of yards.
Just a few things to think about. I think everyone would agree that going inside that mark at night was silly, all things considered.
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")
"Well, I just climb up to them."
by Joe Brown, English rock climber
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