15 cm SK C/28 in mounting MPL C/28
"Gneisenau" had also 4 deck mountings with one 15 cm gun each. So they did not need a hole in the ground to use them elsewhere. These guns were placed in open emplacements in a second battery at Petsamo.
| Battery | Location | Turrets | Bunkertype | Remarks |
|---|---|---|---|---|
| Petsamo | Petsamo, Finland | 4-1 | open |