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 firstname.lastname@example.org, but you can also send your reports directly to email@example.com. Mind you, Kystradio Sør is only responsible for stations below 65N. The more northern stations are responsibility of Kystradio Nord.
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/Horsten 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).