Hi Mspot
Are you using mods with an interface in it?
If you can list your mods see tutorial post #9
The Snorkel is enabled from TDW's Options File Editor Viewer (OFEV)
Check out my tutorial post #6 how to enable the OFEV
If you enable Decks Awash in the OFEV you also need to enable the patch in TDW's Generic File Patcher (GFP)
As you use steam you will need to go to tutorial post #125.
The GFP sorts out a lot of the game bugs plus gives you the opportunity to enhance your game play.
If you can get the dvd version of SH5 then you will be better off than using steam.
The OFEV may also sort out your other problem as there are many settings that can be changed to enhance your game.
Step By Step Tutorials & How To Do It.
http://www.subsim.com/radioroom/showthread.php?t=211804
Peter