drop keel meaning in Hindi

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For a second attempt to surface, the 11-ton drop keel was released.
For drop keels full cabin height cases are usually required under safety rules.
All were brig-rigged and received Schank sliding or drop keels.
In general there is the drop keel or swing keel.
She also has a retractable transducer centerboard ( drop keel ) for deploying various sensors under the vessel.
Underwater acoustics instrumentation is fitted in two drop keels as well as special " arctic tanks " for operations in ice-covered seas.
A drop keel containing transducers for the measurement of plankton density and ocean currents can be lowered below the bottom of the ship.
A drop keel can be sailed with the board partly raised without upsetting the centre of hull resistance and balance of the boat.
Swing keel cases can sometimes be kept beneath floors and intrude less into the cabin, but are considered less efficient than a drop keel.
After 10 hours, Lonsdale made an attempt to resurface, including ditching the vessel's 11-ton drop keel which meant the submarine would never be able to dive again.

noun.

a retractable fin keel used on sailboats to prevent drifting to leeward
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