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navigationposition fixing
3 – cru i s i ng CLASS G
• the pilot in command of a VFR flightwishing tonavigatebymeans of
radionavigation systems or any othermeansmust indicate in theflight
notification only those radio navigation aidswithwhich the aircraft is
equipped and the pilot is qualified to use (seeNote 2).
• VFR aeroplanes operating above FL200must beequippedwith an
altimeter calibrated to IFR standards.
Note 1: A pilotmust not undertake a VFRflight on topofmore thanSCT
cloud unless the aircraft is equippedwith serviceable flight and
navigation instruments as specified inCAO20.18Appendix IV.
Note 2: ‘Qualified’means theholder of an instrument ratingor NVFR rating
which is endorsed for the particular navigation aid or any privateor
higher category pilotwho has received in-flight instruction from a
qualified instructor in the useof the radionavigation aid as the sole
means of navigation, andwho is competent to navigate by useof
the aid.
Note 3: Pilots arewarned against initiatingVFR-on-topwhenweather
conditions aremarginal. Before committing their flight tooperating
VFR-on-top they should be confident thatmeteorological
information used is reliable and current, and clearly indicates that
the entire flightwill be able tobe conducted inVMC.
ALTERNATEMEANSOFNAVIGATION
An aircraft operating under theVFR can also benavigatedby:
• a full time licensed flight navigator; or
• an approved self-contained navigation system, or approved long range
radionavigation system; or
• use of a radio navigation system or systems on routeswhere, after
making allowance for possible tracking errors of ± 9° from the last positive
fix, the aircraftwill comewithin the rated coverageof a radio aidwhich
can be used to fix the position of the aircraft. Themaximum time interval
between positive fixesmust not exceed two (2) hours (AIPENR1.1)
Note: Self-containedor long range navigation systemsmay only be used
as the solemeans of navigation if the system installed in the aircraft
has been approved byCASA and the pilot in command operates the
system in accordancewith the terms of this approval.