One of the great flying craft neared the position into which the “Logan” was steaming. Suddenly she swooped a bit lower and let go an object that dropped fast, going out of sight under the water.
There was a turmoil ahead among the waves. As the destroyer moved forward those on her decks saw oil spreading over the water.
“Signal a hit, then follow the airship,” Dave directed.
Moving, now, no faster than did the destroyer, the hydroairplane scurried about through the air, swooping, banking, diving and rising. At last, apparently she located another submarine. A bomb dropped, but Dave, driving his ship through the water after the explosion, found no tell-tale oil signs.
“Wide of the mark,” signalled the Britisher.
Presently the hydroairplane again caught sight of the prey it was stalking. Another bomb fell, but still no hit.
“We’ll fly just over the enemy,” wirelessed the hydroairplane. “At the instant you’re fairly over we’ll signal you.”
“That’s the right way to hunt,” declared Danny Grin, under his breath.
Acting on the suggestion Darrin steamed in until he was directly under the air craft. The signal came. Dave ordered a bomb dropped, and steamed rapidly away from the place of the coming explosion. Then he swung around, driving back at full speed.
“A hit,” signalled the airship.