Hi excel
What I do is go to the centre of my patrol grid and draw out the circumference area with the compass in advance so I know what time roughly I have started the objective.
It is only EBCW that is 2 days and a patrol area of 80km all other mission grids NWA and SWA are 3 days long and each has the same patrol distance area of 250km.
Just stay within the circumference ring to make sure you complete the objective. Personally I would not chase anything that is going to go outside that ring.
We all have our own way of doing things but I find this works for me.
I do not whether you saw this in a previous post but I find it very useful.
There is an icon that switches the button on and off.
If the button is on when you complete your final grid it automatically disappears.
http://www.subsim.com/radioroom/show...postcount=3872
Peter