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A submarine “hunt” took place in the southeast of the Aegean last Monday and Tuesday with the Greek forces successfully locating the three Turkish submarines that tried to develop in the area between Crete, Karpathos, Rhodes and the Cyclades.
Greece traditionally has highly trained crews but a very strong fleet with 11 submarines, of which 5 have a clear quality advantage over the Turks.
The Greek submarines of the class “Papanikolis” and “Ocean”, are visible case by case only when they are directed or returning from the area of operations.
By contrast, conventional Turkish submarines must appear on the surface at least every three days to receive oxygen to power their engines.
Another advantage is that Greek forces have been mapping every point on the seafloor for decades. After all, our country is one of the first in the world to have a submarine.
The Greek antisubmarine means
In the search for Turkish submarines, Greece has made available a number of means.
The frigates of the Navy that specialize in antisubmarine warfare with active and passive sonar.
The frigates also house organic helicopters with special equipment for anti-submarine warfare. These helicopters plunge a special sonar deep into the water while hovering over the suspicious area.
How the submarine operator finds out that he has been located
The captain of the submarine can immediately perceive if he is being searched but also when he has been perceived by the movements of surface ships moving in the area. Each ship has its own sound signature, and therefore the sonar operator of a submarine can perceive not only the class, but exactly which ship is behind it.
A second bad omen is when the submarine pilot hears the sound of a low-flying helicopter. In this case, the water vibrates as it descends to sink your sonar.
When the submarine is finally sighted, the surface ships activate the sound machine that emits an extremely powerful sound, the so-called ping – as the crews call it – is very powerful and can be understood not only by the pilot but also by the entire crew, who perceive the sound as if it were inside a bell.
This is because frigates, helicopters and submarines that are looking for each other, proceed to extract firing elements, that is, with high frequency sound, they precisely locate the rival submarine. The sound emitted by active sonar is very loud, it propagates to the bottom and when it reaches the submarine, it is reflected off the metal hull and returns in seconds, now providing the exact position of the submarine.
Source: skai.gr
