What is the reserve in Final Reserve Fuel for then?
Sasless calls FRF "land right now fuel", but the possible consequences of landing 'right now' must surely be worse than using the remaining 20+ minutes of flying time to find a suitable and safe unhurried landing site.
In the course of things, calling it 'Land right now fuel' doesn't make sense.
105 kgs - Final Reserve Fuel - Land right now
68 kgs -
FUEL Caution - Land as soon as practicable
48 kgs-
LOW FUEL Warning - Land within 10 minutes
(105 kgs NPAS night/hostile area FRF)