Originally Posted by
Checkboard
Day VFR nav - climb en-route is fine, and not a lot more fuel for a piston than cruise.
Night VFR - flight below the LSALT en route isn't that smart, the safest option is to climb to the LSALT while in the airport area, before launching en-route. That's why the climb fuel mentioned in that post matters.
Why? At night, just use the 10 and 25 NM MSAs as published in AIP to step up to cruise. It's very inefficient to immediately climb to the en route LSALT while still within the circling area. Cruise flight below the LSALT is not very smart during daytime, either.