TNPSC Current Affairs June 2017
To extend the endurance of Six Scorpene
Submarine, Indian Navy is planning to install Air Independent Propulsion modules
which will be done when the submarines go for normal refit after six years of
its induction.
INS Kalvari , the first Scorpene submarine is
all set to join Indian Navy in another 2 monts and would go for normal refit in
2023 and other 5 submarines will go for Induction at nine month intervals.
Advantages of Air Independent Propulsion:
Air Independent Propulsion is a system which
brings a supply of oxygen on board the vessel, which helps the submarine to
generate electricity even in under water.
It
allows Diesel Submarines to operate without having to surface or to access
atmospheric oxygen ,helps submarine to stay
under water longer than the normal diesel –electric submarine.
About Diesel Electric Submarine.
Diesel electric submarine uses diesel fuelled generators
to create electricity, but diesel engine requires oxygen to generate electricity.
It makes submarine to come to surface to charge its batteries.
Thus diesel electric submarine cannot stay longer
period under water, and cannot carry out operation in stealthy manner, which
makes more chance of being detected by enemy ships and aircrafts.
Nuclear-powered
submarines can avoid this difficulty, because it doesn’t require oxygen to
create electricity. But it creates a detectable sound because of coolant
system, whereas as diesel electric vessel is silent.
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