I hope RFDS did not was their tax free $$$ on that slick video. A jet landing on a dirt strip. Woopie dooo!! A B350 would have been a smarter deal operationally, pilot endo, flexibility wise. Royal Darwin Hospital is a lot closer than Perth for northern WA; an extra 100 kts TAS would make 3 parts of fxxk all difference to a clinical outcome ( which is actually the objective might I suggest). To correctly operate a >5700kg jet from a given runway a type A obstacle survey is usually required- how many dirt strips have that?