Our OFP spells out what is legally required.
TRIP 39987 05.19 ..... .....
CONT5PC 1999 00.16 ..... .....
ALTN 1720 00.12 OMRK ..... ..... ....
FINRES 3343 00.30 ..... .....
PLNTOF 47049 06.17 ..... ..... FOUR SEVEN ZERO
DIFF ..... .....
PLNTOF ..... ..... (CORRECTED)
EXTRA ...... ..... POSS 27578L ..... .....
TOF ...... ..... ..... .....
TAXI .... 720/00.18 .....
BLOCK ...... TCAP 116915 ..... REM FUEL ..... AT .....
We would operate with either:-
trip fuel, 5% contingency and 30 mins final reserve
Or
Trip fuel, + alternate + 30 mins final reserve 5% contingency
5% contingency is often reduced to 3% with the selection of an ERA