BKK-45

NK-45 system context

The documented NK-45 installation combines MIS-45, the Rumb-1A attitude-and-heading system, the Orbita-10TS-45 computer, BKK-45 units and control panels. It interfaces with RSBN-PKV, DISS-7, A-711/A-713/A-312 equipment, landing aids and radio altimeters. This establishes a Tu-22M context, while the exact quantity and execution depend on aircraft modification.

Identification and selection

The number 45 is part of the system identity and must not be confused with BK-45 or BKK units from other equipment. Compare the original БКК-45 marking, drawing number, connector layout, mounting and the NK-45 wiring documentation. A matching enclosure is not enough to establish compatibility, and no direct substitute should be claimed without an approved interchangeability record.

Inspection and ordering

Inspect the case, connector contacts and keys, mounting points, seals and identification plate. Functional testing requires a known NK-45 interface and approved procedure; individual circuits must not be powered from assumptions. An enquiry should state the aircraft modification, complete marking, quantity, condition, passport and delivery set. Related navigation and switching equipment is listed in Electronic Control Units.

BKK-45 interfaces and effectivity control

NK-45 descriptions show that the navigation complex exchanges data with radio-navigation, Doppler, attitude-and-heading, air-data and landing equipment. BKK-45 provides switching within this integrated environment. The equipment list varies between Tu-22M modifications; therefore the aircraft modification, NK-45 execution and connector map must be stated together when a replacement unit is selected.