[[File:danger.jpg|caption|left]]A '''“NAV” warning flag''' will let you know that you should '''NOT''' trust the Compass indicator in the following cases:
[[File:danger.jpg|caption|left]]A '''“NAV” warning flag''' will let you know that you should '''NOT''' trust the Compass indicator in the following cases:
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* <span style="color:#0000ff">'''No waypoint'''</span> is selected for the instrument;
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* '''No waypoint''' is selected for the instrument;
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* The waypoint distance is <span style="color:#0000ff">'''over 250 nautical miles'''</span>;
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* The waypoint distance is '''over 250 nautical miles''';
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* The <span style="color:#0000ff">'''GPS accuracy'''</span> is less than 2.5 nautical miles.
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* The '''GPS accuracy''' is less than 2.5 nautical miles.