On an approach plate where it shows the minimum safe altitude around an airfield what is the radius when not shown?Thanks,Chris

Probably 25 NM. That chart is outdated anyways, in Norway charts are provided free online by the ATC provider, this is the newer version of the one you are looking at: https://www.ippc.no/norway_aip/old/AIP/AD/ENGM/EN_AD_2_ENGM_4-25_en.pdf .https://www.ippc.no/norway_aip/old/AIP/AD/ENGM/engm.html