Skip to main content


Navigational Aids (Navaids)

Systems Interface is an acknowledged world-leader in the provision of complex aviation navigation systems. Collaborating with technology leaders in their field, Systems Interface work exclusively with high-calibre product providers to deliver tailored turnkey solutions for airport and enroute applications in the civil and military defence arenas. 

Aviation navigation systems  are comprised of navigational aids, commonly known as navaids. Navaids are a form of markers, signals or devices that aid an aircraft by guiding and navigating it to its destination. 

Systems Interface navigational aid (navaid) solution elements consist of:

  • Instrument Landing Systems (ILS)
  • Distance Measuring Equipment (DME)
  • Doppler VHF Omnidirectional Range (DVOR)
  • Non-directional Beacon (NDB) 
  • Tactical Air Navigation System (TACAN)

Navaid solutions are designed and developed by in-house engineers and specialists supported by thorough analytical assessments to optimise the configuration and siting of the equipment. 
Systems Interface undertake full scope delivery and the delivered solution will not just include equipment supply, but also include ancillaries, support services, flight calibration checks and safety case development. Additional ancillary systems and support services necessary to deliver an integrated navigation solution, will be unique to each delivery but can include: shelters, power systems, civil works, site surveys, inter-site communication networks and security systems.

As an independent systems integrator, Systems Interface collaborates with a range of world-leading OEM (original equipment manufacturer) suppliers to deliver the optimal customer solution.

Navaid Solution Elements

Instrument Landing System (ILS)

An Instrument Landing System (ILS) is a precision runway approach aid employing two radio beams to provide pilots with vertical and horizontal guidance during the landing approach.  ILS systems are crucial for airports as they increase the reliability of every landing, reduce the decision altitude (altitude at which the pilot either commits to the landing procedure or diverts) and ultimately ensure that the pilot can understand the runway no matter the conditions.

Distance Measuring Equipment (DME)

Distance Measuring Equipment (DME) uses the propagation delay of radio signals between an aircraft and a corresponding ground station so that the line of sight distance between the aircraft and ground station can be calculated.

Doppler VHF Omnidirectional Range (DVOR)

A DVOR (Doppler VHF Omni Directional Range) is a short/medium-range radio navigation system. It is used to aid aircraft in determining their flight position and direction in relation to their destination. The DVOR is a development from the CVOR (Conventional VHF Omni Directional Range) delivering higher performance.

Non-directional beacon (NDB)

Non-Directional Beacons (NDB) transmitters dramatically improve system effectiveness and feature a range of models with outputs from 10W to 2KW. Systems Interface has teamed with Nautel of Canada who design and manufacture the leading Vector series of NDBs.

Tactical Air Navigation System (TACAN)

TACAN (Tactical Air Navigation system), is a navigation system primarily used by military aircraft. The aim of a TACAN is to provide the aircraft with bearing and distance to a ground-based station.  The operation of a TACAN can be likened to that of a DVOR/DME system that provides range and bearing information for civil aviation.  

Manage cookies