Via Stian Tveit, QSL manager at Kystradio Sør, I got this informative QSL letter for my reception of Ørlandet Radio at 518 kHz, I sent my report to kystradio.sor@telenor.no, but you can also send your reports directly to stian.tveit@telenor.no. Mind you, Kystradio Sør is only responsible for stations below 65N. The more northern stations are responsibility of Kystradio Nord.

QSL Letter Orlandet Radio - Kystradio Sor
QSL letter from Ørlandet Radio on 518 kHz

Orlandet Radio, callsign LFO is one of three stations that broadcast NAVTEX information on 490 and 518 kHz. The others are Jeloya and Rogaland Radio, all controlled from Kystradio Sør.
UPDATE: what is known as Jeloya (letter M) is actually located in Tjome/Horten and should be referred to as Tjome Radio. Rogaland (L) and Orlandet (N) are still – albeit remotely operated – separate transmitter sites. See also comments below. (Thanks to Stian Tveit from Telenor).

LGQ Rogaland Radio with B1 “L”, Jeloya which is actually Tjome “M”, and Orlandet “N” came in nicely!