mid-1990s Russia offset debt to South Korea through supplies of weapons. The Ka-32A11BC features a high power-to-weight ratio and ease of handling, owing to its coaxial rotor design. The rotors' diameters are not restricted by the presence of a tail rotor and associated tail boom; this facilitates maneuvering near obstacles and helps assure exceptional accuracy when hovering in heavy smoke and dust conditions. The Ka-32A11BC may be equipped with the Bambi Bucket suspended fire-fighting system of up to five tons capacity. The service life has been extended to up to 32,000 flight hours. Since the 1990s, China has purchased the Ka-28 export version and Ka-31 radar warning version for the PLAN fleet. Ka-31 purchases were first revealed in 2010. It is believed that Chinese Ka-28s have been equipped with more enhanced avionics compared to Ka-28s exported to other countries. In 2013, Russia tested the new Kamov Ka-27M with an active electronically scanned array radar. The basis of the modernization of the Ka-27M is installed on the helicopter airborne radar with an active phased array antenna FH-A. This radar is part of the command and tactical radar system that combines several other systems: acoustic, magnetometric, signals intelligence and radar. All the information on them is displayed on the display instrumentation. Ka-32s are used for construction of transmission towers for overhead power lines, as it has somewhat higher lift capacity than the Vertol 107. In Canada, the Ka-32 is used for selective logging as it is able to lift selective species vertically. In August 2013, a Kamov Ka-32, C-GKHL operating in Bella Coola, British Columbia, Canada, experienced failure of one of its Klimov TV3-117BMA engines (manufactured by Motor Sich in Ukraine). The subsequent technical investigation indicated that there was poor quality control in the assembly of the compressor turbine, leading to failure of the complete unit after several compressor blades separated. Ka-27s have been used by the Syrian Navy during the ongoing Syrian Civil War. Variants Military Ka-252 First prototype. Ka-27K Anti-submarine warfare prototype. Ka-27PL (Helix-A) Anti-submarine warfare helicopter. Ka-27PS (Helix-D) Search and rescue helicopter, ASW equipment removed and winch fitted. Ka-27PV Armed version of the Ka-27PS. Ka-27M The latest modification of the helicopter, equipped with radar and tactical command systems that include the following systems: acoustic sensors, magnetometric sensors, signals intelligence, and FH-A radar with active phased array antenna. The radar is mounted under the fuselage and provides all-around vision in