[PrairieDawg]

You wrote:

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The San Francisco Bay can be a pretty tough dive in the first place because of the low visibility, swift currents, and cold temperatures

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Could a tethered submersible robot get down there, or would it be thrashed too much? No risk to people that way and an answer sooner...

FRegards, PrairieDawg

[antaresequity]

There are no swift currents in this area at all. Berkley marina is located deep on the berkely flats...currents dont really exists except in the outer channels...The bottom is basically dead flat mud...The avg water depth is around 15 feet in the harbor and channel, and less on the surrounding flats. They could check this "signature" in less then an hour if they wanted to. In fact you could probably reach this "signature" with a long pole at low tide.