Products
Air navigation aids
Precise Guide to Landing Approaches
The GP (Glide Path) operates between 328 and 336 MHz to generate the glide path that guides aircraft during the landing approach. It uses 150 Hz and 90 Hz modulations to indicate altitude adjustments, displaying the correct path in the cockpit when both signals are balanced. Its guidance beam is formed at the intersection of the vertical heading plane and the horizontal glide plane. In addition, marker beacons mark the distance to the runway threshold with specific Morse code signals, improving approach accuracy and safety.
Horizontal Navigation Precision for Landings
The LOC 421 system operates between 108 and 112 MHz, providing left-right horizontal guidance for landing approaches from up to 30 km away. It generates a vertical guidance plane with modulations of 90 and 150 Hz. When the aircraft veers, one of the signals predominates, indicating to the pilot whether to adjust left or right, ensuring navigational precision and safety.
Short and Medium Range Precision Radio Navigation System
The DVOR 432 is an advanced radio navigation system recommended by ICAO, used for short- and medium-range aircraft guidance, especially in difficult terrain. It uses the Doppler effect and a wide-base antenna to generate highly accurate azimuth signals. Unlike a conventional VOR, the DVOR swaps the functions of 30 Hz modulations to improve azimuth accuracy. The signal is transmitted omnidirectionally, modulates voice and identity codes, and the subcarrier is frequency modulated according to azimuth, providing more precise navigation.
Short and Medium Range Navigation Radio Aid System
CVOR 431 is an ICAO-recommended navigation system used for short- and medium-range aircraft guidance and is remotely controllable. It works by measuring the phase angle of two 30 Hz signals, one reference and one variable, which change with azimuth. This allows the pilot to receive precise information on the aircraft’s position relative to the beacon, its heading, and the “FROM/TO” indication to determine whether it is heading toward or away from the beacon. The system is useful for determining the aircraft’s position relative to CVOR beacons and can be used with a map and frequency chart.
Precise Navigation at Short and Medium Range
DME is an ICAO-standardized radio aid system used to measure the distance of aircraft from a ground reference. It works by using a secondary radar that measures the propagation delay of a radio frequency pulse emitted by the aircraft and returned by a ground station. In combination with a VOR, DME determines both direction and distance using the rho-theta method. The system is also used in combined configurations as VOR/DME or VORTAC, and is capable of responding to multiple aircraft simultaneously. Distance is calculated by measuring the interval between the emission of the interrogation signal and the response, providing accurate and reliable information for air navigation.
Remote Monitoring of Navigation Systems
Navigation Equipment Monitoring and Alerting
The SI 446 is a monitoring device that displays the status of navigation equipment in the control tower. It indicates changes in operating status through audible and visual alerts, without allowing direct control of the equipment. Its name and status are displayed on configurable displays with brightness adjustments. It can be connected to the RCSI unit or controlled from the LCSU/IOM unit using a serial connection or a modem for long distances.
