Birdwatch Note Rating
2023-06-23 20:59:47 UTC - HELPFUL
Rated by Participant: 7E88A6EA97A487F60BD5784D8AD8EB0A715F9707CB0AF66EDA19580B2F29A22C
Participant Details
Original Note:
Radio frequencies used by GPS cannot penetrate water beyond a few centimetres. https://link.springer.com/article/10.1007/s00190-018-1147-x Wildlife trackers with transmitting capability either use acoustic signals to a nearby vessel, or RF which requires the animal to surface or the tag to detach and float (by design). https://www.himb.hawaii.edu/ReefPredator/Tools.htm
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