This brings me to another ques. understand 1deg = 60nm, But I have seen articles and notices of RlatSM being 23nm, 25nm and 30nm. I'm confused by this. Can someone care to explain?
"The RLAT Track will have half-degree latitude separation with the two tracks beside it. In other words, it will be spaced 30nm from the tracks to the north and south of it."
"Reduced Lateral Separation Minimum (RLatSM) is the implementation of 25nm lateral separation standards in North Atlantic High Level Airspace (HLA) (Minimum Navigation Performance Airspace (MNPS)) for qualified aircraft flying within the Organised Track System (OTS)."
"RLongSM (5 minutes longitudinal) and RLatSM (23 NM lateral on. ½ degree tracks in NAT Organized Track System"