FREDA is a cruise/re-join check
F=Fuel Check
R= Radio and Nav Aids
E = Engine temperatures & oil pressures + carburettor heat on to check/remove ice in the carb venturi
D = Direction i.e. heading correct and Direction Indictor alligned with compass
A = Alititude Check
HASELL is a check done prior to doing aeros or stalls etc
H = Height Sufficient to recover by >3000ft AGL
A = Airframe, Flaps etc
S = Security of hatches and harnesses and no loose articles in the cabin
E = Engine mixture rich, carb heat check and engine Temperature & oil pressure
L = Location A = clear of airfields, B = built up areas and C = cloud and controlled airspace
D = danger areas
L = Lookout turn
Lastly
HELL is a cut down version of HASELL done in between individual stalls in a sequence of set
H = Height
E = Engine T & P
L = Location
L = Lookout turn
That's it roughly, but there maybe variations on the theme
