Aircraft fuel gauges are renowned for being very inaccurate so Stephen (co-owner in G-GAST) and I recalibrated them by draining the 2 x 80 litre tanks then refilled measuring out 15 litres at a time and marking where the needle sat on the analogue gauge. The aircraft has a range of just over 540nm and with some of the African legs being over 400nm there will be little margin for error especially if a headwind is encountered.
