A
To provide acoustic countermeasures that distract and lure incoming homing torpedoes away from the vessel
B
To accelerate the vessel in shallow coastal waters during littoral combat
C
To pump water through external nozzles for high-speed marine propulsion
D
To map the ocean floor using high-frequency sonar pulses for underwater navigation
Correct answer: (a) To provide acoustic countermeasures that distract and lure incoming homing torpedoes away from the vessel
Explanation
A Torpedo Decoy System is a defensive acoustic countermeasure launched to distract and lure incoming homing torpedoes away from the vessel, making B correct. Option B describes waterjet propulsion, option D describes sonar systems, and option C also describes waterjet propulsion mechanisms.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.