all very technologically impressive I'm sure,
... but why?
(
catweasle neither a cat nor a weasle, Wed 2 Feb 2011, 22:25,
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Its to measure waves and currents etc
When the boat is in a vertical position its really stable as it goes really deep. If you used a normal boat it would be affected by the movements of the sea and so you wouldn't get accurate measurements.
(
Sheriff John Bunnell https://twitter.com/thewonderfulgam, Wed 2 Feb 2011, 22:30,
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