I always check the speed twice. It's probably the most important step in a solution, especially if you're doing a quick and dirty solution on a fast moving target. If you're at a reasonable range (2000-1500 is my preferred) you can fudge a little on AotB, especially if you make it a habit to always try for 90 degree attacks angles. After awhile your eye gets sharper at guesstimating. Goodhunting. :salute:

You'll have to compare the measured distance (over 5 minutes) to the numbers in the minute-table (5 minute column) to see which speed is closest to it. It's the same way, just takes longer in time. And measurements over longer period is more accurate, so it's better. :up:

many thanks for your help Pisces:up: