– FS2000-FS2004 Descent Calculator flight2000it 16 years ago FS2000-FS2004 Descent Calculator, version 2. Simple calculator to find the rate of descent to a givin altitude and the distance to start descending. By Shayne Bouda. 1,5 Mb – FS2000/FS2004 Descent CalculatorFS2004/FSX – Ascent Descent CalculatorFS2004/FSX – Ascent Descent Calculator