# Why does my distance calculation not match the distance given in the definition of a danger area?

I'm looking at the definition of a danger area in an AIP section "ENR 5.1 Prohibited, restricted and danger areas", and it's the following.

From 240630N 0543000E counter clockwise along an ARC
of 5.2 NM radius centred on
240400N 0543500E to
240440N 0544040E to
240630N 0543600E to
240630N 0543000E


from this I understand that the distance between the center 240400N, 0543500E and the first point 240630N, 0543000E should be 5.2 NM, but when I calculate the distance between this two points I get 5.685 km or around 3.07 NM.

Why am I getting a different result than what's in the definition incorrectly?