keep afloat

I was just able to turn on my back and keep afloat until I could grasp the top branches of the tree.

Once assured that his surf-boat would keep afloat, Blake took the oars and began to row.

She was struggling to keep afloat, sinking, then rising to the top again.

"I reckon our first business is to try to keep afloat," Ralph answered.

The water increased in the hold, and it soon became evident that the Colossus would hardly keep afloat until morning.