"Buoy and fishnet," he decided after a quick scrutiny.

Frank kept the late watch that night. At 4 a.m. he turned in. At five he
climbed hastily from his bunk at the jingle of general alarm, and reached
the bridge on the run in time to see the exchange of recognition signals
with a British man-o'-war, which vessel had run into a submarine while the
latter was on the surface in a fog. The warship had just rammed the
U-boat.

"Can we help you?" Frank called across the water.

"Thanks. Drop a few depth charges," was the reply.

This was done, but nothing came of it Frank returned to his bunk.

"Pretty slow life, this, if you ask me," he told himself.

He went back to sleep.




CHAPTER II

THE BOY CAPTAIN AND HIS LIEUTENANT


The U.S.S. Plymouth was Jack Templeton's first command. He had been
elevated to the rank of captain only a few weeks before. Naturally he was
not a little proud of his vessel. When Jack was given his ship, it was