Quote:
Originally Posted by sailingdog
GPS chartplotters can often be a bit different from the reality...and you need to double check the chartplotter against the real world. Just remember, that an icon of a boat on a chartplotter screen is an idealized idea of where a boat is but placed against a cartographer's electronic interpretation of the real world that may be using faulty or old data, and should not be trusted implicitly IMHO.
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Nigel Clader explains this concept really well and in great detail in his book "How to Read a Nautical Chart."