I naturally disagreed, and did so the more readily that I conscientiously disagree with him. I find that there is a tendency on the part of some of these submarine officers, who have been U–boating a long time, to get into narrow grooves. Most reserve officers are not like this, as they have only been in during the war. Alten is an exception; he left the Hamburg–Amerika on two years' half pay in 1912, and was, of course, kept on in 1914. After all, the depot staff are Germans, and as such labour for the Fatherland, and though their work in office and workship is not so dangerous as ours, on the other hand they have not got the stimulation before their eyes, of glory to be gained. Personally I am of the opinion that the torpedo broke surface because, being fired from the outside tubes, it probably started too shallow, dived deep, recovered shallow and dived deep, broke surface and dived very deep. A sticky motor or sluggish weight would give this effect.
And are these external tubes water–tight? Theoretically, yes, but what of practice? We have been down to forty metres several times during this trip, and not once have we had a chance on the surface of getting at the two external tubes; add to which our depth gear, with the pivots of the weight exposed to water if the tube does flood and then you have rust, corrosion and heaven knows what complications.
I saw a British Mark 11.50 torpedo at the torpedo shop at Bruges the other day, and I was much struck with their deep depth gear, which is of the unrestrained Uhlan type, i.e., weight and valve interdependent. But then the main feature is that the whole gear is contained in a separate water–tight chamber.
Our system is certainly a great saving in space, and is much neater in design, whilst I prefer the Uhlan principle of valve conjuncting with weight, but it would be interesting to know whether the British have much trouble with the depth–keeping of their torpedo.
I have written quite a disquisition on depth gears; I must get on with my record of events.
After lunch we had a good look round, but the small airship was still hanging about, flying slowly in large circles.
We were rather surprised to meet one of these despicable little sausages or "Zeppelin's Spawn," as the navigator calls them, so far from land, and at dark we surfaced and proceeded on one engine on an easterly course, charging the battery right up with the other engine.
Dawn revealed a blank horizon, not a vestige of mast, funnel or smoke in sight.
We ambled along in fine though cold weather, and I took advantage of the peacefulness of everything to do a really good series of Müller on the upper deck, stripped to the waist, and allowed the keen air to play its invigorating currents on my torso.
Alten silently watched me from the conning tower, with a sneering expression on his face. The navigator, who is quite a decent youngster, though of no family, was, I could plainly see, struck by my development, and asked to be initiated into the series of exercises. I agreed willingly enough to show them to him. I will confess I wish Zoe could have seen me as I perspired with healthy exercise.
At about 11 a.m. a couple of masts, then two more, then another, appeared above the horizon. The visibility was extreme, so we at once dived and proceeded at full speed, ten metres.
We had been going thus for perhaps half an hour when Alten remarked that he would have another look at the convoy. We eased speed, came up to six metres, and Alten proceeded up into the conning tower to use "A" periscope.
He had hardly applied his eye to the lens when he sharply ordered the boat to ten metres, accompanying this order with another to the motor room demanding utmost speed (Ausserste Kraft). I went up to the conning tower and found him white with excitement.
"Look!" he exclaimed, pointing to the periscope, entirely forgetful of the fact that we were at ten metres. I looked, and of course saw nothing; furious at the trick I considered he had played on me I turned on him, to be disarmed by his apology.
"Sorry! I forgot! The whole British battle cruiser force is there."
It was now my turn to be excited, and I rushed down to the motor room determined to give her every amp she would take. The port foremost motor was sparking like the devil, rings of cursed sparks shooting round the commutator, but this was no time for ceremony. I relentlessly ordered the field current to be still further reduced.
