Fuggy2K
yer not really thinking this through mate!
you know you are off track cos you have "fixed" not on track. Doh!
Measure the distance you are off track from the map scale!!! Doh!
Now regain track. If you wait - you will be further off track and therefore all the How long to regain track sums will be bollox.
using SCA the only real choice you need to make is how soon down track do you want to rejoin the planned route. Realistically - take a look at the map and make life easy - plan to rejoin at / just before a good "fix". Something of as unique-a-feature-as-possible, on or very near to track.
KISS
