This would carry on all night - I don't know how the captain ever sleeps.

The captain had not slept well in two nights.

He was able to determine the relative importance of the sailors, and who it was that took command when the captain slept.

While the captain slept in hostile space, the executive officer stood the watch.

On the bridge the captain sleeps very rarely and takes his coffee in his hand.

No, but a captain may not sleep out of his ship without the port admiral's permission.

The captain was sleeping soundly, and the flyer hoped the nightmare wouldn't come back.

The captain did not sleep that night.

Then, as the captain slept, Spock would move outside to patrol the building through the night.

In due time the captain recovered consciousness, and slept.