Hi Quick suggestion that is used in aviation and I would have found use full in lots of my landings is the Radio Altimeter. This gives your height above ground on your current position. This would let you plan a retro burn at a specific altitude to get a good landing rather than a look and guess your altitude and when to retro burn for the landing. On a side note I currently use something inspired by the dam busters setup for judging my height above the ground. 2 lights pointed at the ground. Regards Tom
