Crossword-Solution: PERISCOPIC 10 letters, 1 clue 🏆 scrabble score: 18

They keep well under the water most of the time, coming up now and then for periscopic observations, or on hearing the approach of merchant craft, which often can be identified readily by the sound of the engines.

But the fellow with the periscopic nose above the covers lies on his back beneath the stars, and contemplation journeys to him from the wide spaces of the night.

But with just the small periscopic tube--or eye of the submarine--projecting above the surface, one craft can scout and watch for another to rise to the surface, thinking no enemy is near, in order to replenish her air supply for breathing or for recharging the electric storage batteries which supply the current for submerged propulsion.

Periscopic spectacles (Opt.), spectacles having concavo-convex or convexo-concave lenses with a considerable curvature corresponding to that of the eye, to increase the distinctness of objects viewed obliquely.

This gave an Australian corporal of engineers an idea that was instantly availed of--the application of a periscopic attachment to the ordinary service rifle.