Some were *mere small humps on the flat sea.
In this flat sea, I thought we might as well stay on the surface.
With such a flat sea, perfect visibility, and the ship only a mile off, the watch couldn't miss seeing me.
No tire tracks scarred the flat sea of snow around it.
Dawn broke brilliant and warm across a still, flat sea.
Heaven is being adrift on a flat sea - with land in sight of course.
"I have a feeling a flat sea may be all we have going for us."
It was a beautiful morning and a flat sea.
Inconstant winds and a flat sea have "led the men to believe we will never get home," he wrote.
He thought of the heads of swimming men, tiny against the wide flat sea.