The Boy Volunteers with the Submarine Fleet

"At your service," said Ralph.

The captain smiled, as he said: "Take positions at the end of the bridge."

The boys walked across to the other side, and Ralph elevated his glasses.

A moment later the captain, in his walk to and fro, stopped before the boys. "You have evidently had occasion to use the binoculars before, but probably not while at sea," he observed.

"No," replied Ralph; "we used them in flying machines and while serving in the artillery, but this is really the first opportunity we have had to use them on shipboard."

"Then a little instruction will be of service to you and to all of us," said the captain. "I noticed that you were sweeping the sea to the rear. That is not necessary, for at our speed a torpedo boat would not be able to catch us. All your time should be devoted to scanning that quadrant from straight ahead to a point but a little astern of your left quarter, as it is from that section, and the corresponding section on the right