ICAO FLIGHT PLAN
CRUISING SPEED and ALTITUDE (Including enroute changes - below ) -
Examples: N0440 (Knots) - - M082 (Mach number) - - K0830 (Kilometers)
Crusing Speed -
................................ Insert the True Air Speed (TAS) for the whole or first defined segment (where subsequent changes are planned) of the route of flight in terms of:
KNOTS - expressed a "N" followed by 4-digits. ( e.g. N460 )
MACH NUMBER - (As may be rquired by local or enroute ATC/ATS facilities) - expressed as "M" followed by 3 figures. ( e.g. M081 )
KILOMETERS PER HOUR - expressed as "K" followed by 4-digits. ( e.g. K0830)
CRUISE ALTITUDE or FLIGHT LEVEL -
................................... NOTE: The term "Flight Level" is essentially synonymous with defining altitude which is referenced to "standard pressure" of 29.92 inches of mercury. In domestic United States airspace, this is normally done only when at or above 18,000 feet...for "Flight Level 180". In oceanic areas and many remotely populated areas of the world, altimeters are referenced to "29.92" at all atltitudes. (Radio altimeters are used at lower, hazardous levels, where necessary). Thus, in oceanic airspace, an aircraft could be assigned to FL090, for example.
................................... Insert the planned cruising altitude/Flight Level for the first segment of whole of the route to be flown in terms of:
Flight Level - expressed as "F" followed by 3-figures. ( e.g. F330 ; F085 )
Altitude in hundreds of feet - expressed as "A" followed by 3-figures. ( e.g. A045 ; A100 )
Standard metric level in tens of meters - expressed as "S" followed by 4-figures. ( e.g. S1130 )
Altitude in tens of meters - expressed a "M" followed by 4-figures. ( e.g. M0840 )
For uncontrolled VFR flight - enter the letters "VFR"
ENROUTE CHANGES OF TRUE AIR SPEED and/or ALTITUDE -
Examples - FRISH/N0350F180 -- CZM/N460F410
..................................... 4602N07805W/N510F350 -- 46N078W/M082F330
..................................... If there is a change of TAS of 5% (Mach 0.01) or more...or a planned change of cruising level/altitude than as initially filed, express the change in the route of flight, as indicated in the above examples. These entries are required, even when there is a separate change to the air speed or altitude. Define the point of change by referencing to a navaid, named intersection or latititude / longitude fix.
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