He had never seen a periscope in his life, but he had read about periscopes.
Periscopes from 20 inches to nearly 20 feet in length were produced in quantity.
We would have our snipers on certain days smash all their periscopes.
The enemy was submerged, only the periscopes showing above the surface of the water.
Neither troopship nor destroyer is showing lights, so the Huns couldnt use their periscopes.
When the line was "quiet" the men were enabled to examine the enemy's positions with the aid of periscopes.
The rumor drifted in to us that there were ten periscopes to be seen, but soon it came down to three.
As he struggled to get free, his own men saw him through their periscopes and made signs to him.
I've had bullets knock dirt into my face, so that I thought that I was hit, and had periscopes smashed to bits in my hand.
Periscopes were served out, and placed about ten feet apart along the trench.