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do not rely on a GPS as your only source or type of navigation tool.

Wise advice.


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Clouds have away of rendering them senseless.

For the wrong reason.  Only sensitive instruments could detect the difference weather makes in a GPS signal.  But given Murphy's law, alternate navigational tools are advisable.      

While I would NOT say a GPS is a required piece of saefty gear, they do provide benefits the compass/map do not.  Low visibility and heavy wind have a way of rendering maps/compass senseless.