> And cameras can't be permanently installed on the open ocean. If the camera can self-calibrate against known objects then camera motion can be adjusted for.

> And cameras can't be permanently installed on the open ocean. If the camera can self-calibrate against known objects then camera motion can be adjusted for. Could use visible reference points (sun, moon, stars) with clear skies. Stars may be visible by a sensitive camera in daytime with good collimation (bottom of well story https://www.snopes.com/fact-check/star-search/ https://www.snopes.com/fact-check/star-search/ ). There are also radio sources (GPS satellites) or more SciFi solution of noisy stellar objects??