FIRE EXTINGUISHER
These explode when shot, so don't get too close.
PROPANE TANK
Like fire extinguishers, these also explode when shot.
FUEL DRUM
These explode when shot, so you can set them off when enemies are nearby to kill the enemies. But don't get too close, or enemies may shoot them too and set them off to kill you.
TORPEDO
Usually located on or near u-boats, these detonate when shot.
LAND MINE
These mines explode on contact, but can be detonated by shooting at them.
*Note: some of these are buried under the snow, so make sure you watch out for telltale signs that might give away their location.
UNDERWATER MINE
These also explode on contact, and can be detonated by shooting at them.