Don.
Skizzenbuch
Page 206 inspection manhole MTB 3 ... this is a manhole in the center bulkhead of MBT 3 may be you should name it : inspection manhole centerbulkhead MBT 3.
The following pages up to 209 deals with the with the Q tanks. I guess we have discussed it before, but to me using "negative buoyancy tank"for Q is strange, in fact all the ballasttanks are negative buoyancy tanks when diving. It is a long and difficult word which we never used in RN English. Untertriebzelle is a much better German word for the tank and so is Q for quick diving. As you are quite frequently using, to me, the correct name "Q", I guess you should stick to the one and same word in your book. Another word you are frequently using in the following pages concerning the periscope is "wench". I am not familiar with this word, as we in RN English use "Winch". Is it a US word?
I have looked so far through all the pages up to 320 apart from the torpedo pages and have so far not any remarks.
Tore