I visited this place yesterday, well worth a visit. If anyone does go I would recommend taking a torch. I didn't

And if you do find yourself in the Alta area I would highly recommend the Tirpitz Museum

MKB 3/ 514 Store Korsnes I (HKB 31/ 971 - 879 )
Equipped with 4 x 15,5 cm K418(f) guns, range 17 000 m. Ready in July 41, evacuated in 44.
MKB 6/ 514 Store-Korsnes II
Equipped with 4 x 15 cm SKC/28 guns, twin mounted, range 23 000 m. Ready in Apr 41, evacuated to Karlsöy Dec 44.