10.5 cm SK L/45 (Schnelladekanone Länge 45, quick-loading cannon with a barrel length of 45 calibers) was a German naval gun that was used in World War I and II and was the successor of the older 10.5 cm SK L/40 naval gun.
The Deck Gun only appears in the mission A Chance Meeting where it is mounted on a U-Boat and Jimmy Patterson uses it to destroy the German fuel depot. The gun has a limited angle but has a very high damage and range. The explosion radius is wide so it can be used to kill multiple enemy soldiers with a single shot.
10.5 cm L/45 appears on the deck of all submarines at the level of Scuttling the U-529. They serve only as scenery and are not used by the player. One such gun is suspended by a crane.
- In Frontline, the weapons is never seen again in the campaign after that particular mission.
- If the player holds down on the trigger it will fire full-auto with a slow rate-of-fire.