Originally Posted by
A320fumes
The easiest place to find this info is on the back of the Jepp north atlantic chart. I believe it's on the bottom of panel e or g. SLOP allows for 1 or 2 mile offsets right of course. Hope that helps.
It's officially the "North Atlantic Orientation" chart, #1/#2, published by Jepp, and it does list the SLOP program. Also, in the MNPS manual, available online, you can read it also. The busiest oceanic region for traffic is the North Atlantic, and that is why SLOP is highly encouraged by OCAs.