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There are "underwater gliders" that propel themselves by ascending/descending via changing their buoyancy and using fins to direct this forwards. They have low
by tgb 5y ago
There are "underwater gliders" that propel themselves by ascending/descending via changing their buoyancy and using fins to direct this forwards. They have low speed but are much more efficient than most subs. Would be interesting to see such a glider take on freight, though it would probably need thrusters for navigation in harbor.
- throwoutway 5y ago> though it would probably need thrusters for navigation in harbor. Perhaps the harbor can have small tugboats that simply hook the freighters and push it into the harbor
- cfn 5y agoSome current gliders already have a propulsion system for fine adjustments that is also used for manouvering in port. I believe they would be too slow for any practical use in the merchant navy. https://en.wikipedia.org/wiki/Underwater_glider https://en.wikipedia.org/wiki/Underwater_glider