GNSS and PBN Flashcards
What is GNSS and PBN?
An RNAV (GNSS)
Is an instrument approach procedure during which the pilot refers to the GPS for tracking information whilst in IMC. No other aid is required during a RNAV (GNSS) The pilot monitors the descent profile by reference to the altimeter. The RNAV (GNSS) procedure is ‘hard wired’ into the GPS receiver and cannot be edited by the pilot. This procedure is in no way related to the GPS arrival and requires a separate endorsement and recency. GPS receivers (also called RNAV GNSS) are certified to certain Technical Service Orders (TSO). The most sophisticated of these is TSO-C145(a) or 146(a) which incorporates FAULT DETECTION and EXCLUSION (FDE) capability. The GPS receivers that are common in general aviation aircraft are usually certified to the lower TSO-C129 or 129(a) standard.
PBN
In a nutshell, Performance Based Navigation (PBN)
is simply saying, if you want to fly IFR en-route or
perform approaches, you must be able to keep to
a minimum level of navigational accuracy. The
navigational accuracy required is defined for the
airspace you are flying in and for the operation
you want to perform. These requirements are
called specifications (either RNAV or RNP).
You must also continuously tell everyone precisely
where you are, using ADS-B and Mode-S
transponders.
