It was hard to believe that a vast ocean lay below the thick layer of clouds.

Take us below the thermal layer we charted this morning.

They seem to be alternating them above and below the layer, sir.

If the Soviets were alternating them above and below the layer, there was a good chance he could sneak between a pair.

Finally they had the contact running east at about ten knots, far below the layer.

Below the dry top layer, he knew the earth would be moist and cool.

It lets doctors see below the shiny top layer of skin.

We don't expect to find any survivors below the first layer.

Supra-permafrost water systems exist below the frozen layer of earth.

The sun had sunk a little below the thin layer of purple cloud.