“True,” replied his commander, “but once out of the canal we will be safe enough, for we can submerge to a greater depth and continue under water until we are safe.”
He gave the command to bring the submarine to the surface, and when it floated upon the water, made his way to the bridge. The lads followed him.
“As I thought,” said the commander, looking about. “We have reached the Baltic—not the Baltic proper, perhaps, but still Baltic waters.”
It was true. Behind could be seen the narrow entrance to the Kiel canal, and ahead the broader expanse of the western arm of the Baltic Sea. There was not a vessel of any kind in sight.
“Well,” said Jack. “Looks like we were safe enough here.”
“Looks that way,” agreed Frank, “but you never can tell, you know.”
CHAPTER XVI.
IN TROUBLE AGAIN.
“What’s that?” asked Frank, as he gazed across the water.
“Smoke,” replied Jack. “It’s plain enough.”
“I know that,” replied the former, “but what I meant is, do you suppose it is a battleship?”