"Well, if the fish isn't too badly injured, he will probably make for one of the shallows, and lie doggo till he has time to effect repairs. Result, every shallow is watched as carefully as a miser watches his gold. And sea planes have a special patrol of the coast to keep them off the shallows by the shore."
"Sometimes, then, in the murk of night, a destroyer must bump into one by sheer good luck?"
"Oh, yes, indeed. Not long ago, a British destroyer racing through a pitch dark rainy night cut a sub almost in half. There was a tremendous bump that knocked the people on the bridge over backward, a lot of yelling, and then a wild salvo of rain blotted everything out. I think they managed to rescue one of the Germans. Pity they didn't get the fish itself. You know it's a great stunt to get your enemy's codes. We get them once in a while. Ever seen a pink booklet on any of your destroyer trips? It's a translation of a German book of instructions to submarine commanders. On British boats they call it 'Baby-Killing at a Glance or the Hun's Vade Mecum.' Great name, isn't it? Tells how to attack convoys and all that sort of thing. Lots of interesting tricks like squatting in the path of the sun so that the lookout, blinded by the glare, shan't see you; playing dead and so on. That playing-dead stunt, if it ever did work, which I greatly doubt, is certainly no favourite now."
"Playing dead? Just what do you mean?"
"Why, a destroyer would chase a sub into the shallows and bomb her. Then 'Fritz' would release a tremendous mess of oil to make believe that he was terribly injured, and lie doggo for hours and hours. The destroyer, of course, seeing the oil, and hearing nothing from 'Fritz' was expected to conclude that 'Fritz' had landed in Valhalla, and go away. Then when she had gone away, 'Fritz,' quite uninjured, went back to his job."
"And now that stunt is out of fashion?"
"You bet it is. Our instructions are to bomb until we get tangible results. Before it announces the end of a sub, the Admiralty has to have unmistakable evidence of the sub's destruction. Not long ago, they say a sub played dead somewhere off the Channel, sent up oil, and waited for the fishers to go. In a few seconds, 'Fritz' got a depth bomb right on his ear, and up he came to the top, the most surprised and angry Hun that ever was seen. Bagged him, boat and all. He must have had a head of solid ivory.
"Got to be cruising along, now. It's four o'clock, and our tender must be waiting for me at the pier."
"Going fishing?" I asked politely.
"You bet!" he answered with a grin.