The German machine swayed crazily from one side to the other; then dived.
"I got him, Frank!" shouted Jack.
Both lads gazed over the side at the falling enemy.
Suddenly the machine righted and descended more slowly.
"By Jove! a cool customer," said Frank. "He's regained control of the plane. He'll be up again in a moment."
Again they watched the foe carefully.
"No, he won't," said Jack, "he's still going down."
"Then we may as well be moving," said Frank.
"Hold on!" shouted Jack. "We can't leave those fellows there. They may get to shore or be picked up. Then they would give the warning and all our efforts would be for naught."
"Right," said Frank. "We'll go down after them."