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The Russian Navy uses about 200 Ka-27s, which were made serially
from 1981. The Ka-27 'Helix-A' armanent consisits of two torpedoes
(AT-1M, VTT-1, UMGT-1 Orlan, APR-2 Yastreb), or 8 PLAB-250-120 depth
charges, or 36 sonobuoys RGB-NM and RGB-NM-1.
A modernisation programme has also been prepared for Russia's unique
Ka-27 'Helix-A' ASW helicopter. The modernised Ka-27M has been tested
but an upgrade of series-produced helicopters was not carried out
because of a lack of funding. The Ka-27M received a new search and
attack system, incorporating a sonobuoy processor and a set of expandable
RGB-16 sonobuoys, TOP as well as a new armament that included APR-3
ASW missiles, KAB-250PL guided depth charges and other weapons.
The Ka-27M can be armed with Kh-35 ASMs, which have a range of 130km.
The aircraft's fuel volume has also been increased thanks to auxiliary
side tanks, as with the Ka-28.
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