ACAS

Airborne Collision Avoidance System


ADS-B

Automatic Dependent Surveillance - Broadcast


ADS-B OUT and ADS-B IN

ADS-B OUT refers to information being broadcast out by the aircraft’s transponder. ADS-B IN refers to information received by the transponder.


ADS-B system

A GNSS position source and a compatible Mode S extender squitter 1090Mhz ADS-B OUT transponder.


AML STC

Approved Model List Supplemental type certificate, which allows a single STC to address several different type certificates. It provides a more efficient process compared to multiple approvals of, for example, installations that are largely similar or identical for several different aircraft models.


ATC

Air Traffic Control


ATM

Air Traffic Management


CAA

Civil Aviation Authority


CAR

Civil Aviation Rule


DME

Distance measuring equipment is a transponder-based radio navigation technology that measures slant range distance by timing the propagation delay of VHF or UHF radio signals.


FIR

Flight Information Region


FIS

Flight Information Service


Flight Level 245 (FL 245)

Flight Level 245 (24,500 feet) is the boundary between upper and lower
airspace in the New Zealand domestic FIR.


FMS

Flight Management System


FSIWG

Future Surveillance Implementation Working Group


GA VFR

General Aviation aircraft that operate under Visual Flight Rules


GLONASS

Globalnaya navigatsionnaya sputnikovaya sistema - GLONASS is the Russian Global Navigation Satellite System.


GNSS

Global Navigation Satellite System, a general term referring to a navigation satellite system including the US GPS network, the Chinese BeiDou, Russian GLONASS and European Galileo systems.


GPS

Global Positioning System - one type of GNSS, owned and operated by the US Government. GPS is the only GNSS currently providing coverage to New Zealand.


ICAO

International Civil Aviation Organization


IFR

Instrument Flight Rules


MLAT

Multilateration: is a ground-based surveillance system. A network of ground stations interrogate and receive replies from aircraft SSR transponders.


Mode A/C transponder

Mode A/C refers to transponders currently mandated in parts of New Zealand airspace. Mode A provides an aircraft identity code; Mode C provides altitude in 100 ft increments.


Mode S transponder

Mode S(elect) transponders are the next generation on from Mode A/C. Mode S provides a much larger number of identification codes, altitude in 25 ft increments, and a range of Downlink Airborne Parameters (DAPs) depending on the aircraft avionics and surveillance system characteristics.


NSS

New Southern Sky


OEM

Original Equipment Manufacturer


PBN

Performance Based Navigation


PSR

Primary surveillance radar. PSR is a non-co-operative surveillance system: it does not rely on information from the aircraft.


RAIM

Receiver autonomous integrity monitoring. RAIM is a technology developed to assess the integrity of global positioning system (GPS) signals in a GPS receiver system. It is of special importance in safety-critical GPS applications, such as in aviation or marine navigation.


SBAS

Satellite-based augmentation system. SBAS measures small variations in the GPS signals and provides regular corrections to aircraft receivers within the specific geographic service areas covered by the system’s ground stations. New Zealand is not currently covered by an SBAS service area.


SSR

Secondary surveillance radar, SSR is a co-operative surveillance system, meaning that it relies on a response from an aircraft transponder.


TCAS

Traffic Collision Avoidance System or Traffic Alert and Collision Avoidance System


TIS

Traffic Information Service


TSO

Technical Service Order, issued by the FAA and provides the performance parameters for equipment certification.


UAT

Universal Access Transceiver


VOR

VHF Omni Directional Radio Range


WAAS

Wide area augmentation system – see SBAS.