A vigia is a warning on a nautical chart indicating a possible rock, shoal, or other hazard which has been reported but not yet verified or surveyed. Some non-existent vigias have remained on successive charts for centuries as a precaution by hesitant hydrographers.
A vigia is a warning on a nautical chart indicating a possible rock, shoal, or other hazard which has been reported but not yet verified or surveyed. Some non-existent vigias have remained on successive charts for centuries as a precaution by hesitant hydrographers.
Source: Wikipedia "Vigia (nautical)" · CC BY-SA 4.0
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