Hello everyone!
I made these code books in Google docs. They are spreadsheets and you can save a copy yourself and modify them how you like.
2 Versions: The first is for roleplay use, codes change twice per day and use all wheel positions 0-9.
https://docs.google.com/spreadsheets...it?usp=sharing
The second version is for fleet PvP. Codes change twice per hour and use only wheel positions 0-3. This so that the 2 teams have a reasonable chance to decrypt the other teams messages in time.
https://docs.google.com/spreadsheets...it?usp=sharing
For example: Sub A and B are on team 1. Sub Y and Z are on team 2. AB and YZ can communicate using their teams code book, however with only 48 possible combinations of wheel settings, messages will be less secure depending on the volume of messages sent and also the time from the previous code change. Just something for the captain to keep in mind.
Codes were generated using Random.org