The two picket boats were withdrawn at this time.

"There seem to be only two picket boats," Adele explained.

He and the tiny picket boat on which he served had been out here for six weeks.

The following week, the submarine sank one 500-ton picket boat and damaged another.

Looking through the slot, he could see that the picket boat had drifted inexorably within range.

There are no picket boats to open and close it.

Later in her career, the picket boat was removed and two barges were added.

It was arranged that he would go by picket boat to Momrath.

She was able to sink one picket boat and damage another with gunfire on 14 August.

The ship also carried an unknown number of picket boats and barges.