Same as most other subs during WWI or WWII. They all looked generally the same, a metal tube with a conning tower on it.
The only way to tell if it was an enemy sub or not was:
1. It's location (example: friendly submarines are not supposed to be in that particular zone, therefore it most likely is an enemy sub).
2. The sub's paint job (paint scheme).
3. Insignia (flag or paint scheme).
4. We could say "if it was shooting at you" then you know it's an enemy sub. But that's not totally correct either; FRIENDILY FIRE! Mis-identification of sub or target.
uboat
The Uboat was a submarine made by the Germans
It was the German way of saying "submarine" which properly should be called a "submersible." It is a shortening of "unterseeboot" to just uboat.
885.853199999 metres
Short for Unterseeboot - literally Undersea boat
In World WarII, the germans named it a uboat
UBoat
24 hours
yes
The u boat can dive 200 to 250feet deep
How many knots u have in ur grassy butt
The Allies sunk German Uboats. Uboat, not you-boat. Uboats stand for Unterseeboot - undersea boat.