Using OTC you should have individual degree marks, plus larger degree marks every 5 degrees. I've deleted the interface from the image, but this is what you should be seeing with an OTC periscope view:
If you're only seeing the lower part of the Bearing Compass, you're not seeing each degree mark. Least that's what I'm suspecting. If so, you're missing some of the game. Maybe try another resolution that gives you a better "fit", giving you a complete image of the game.
If you switch resolutions/aspect ratios, don't forget to change your "OTC Aspect Ratio Mod" to match what you've changed to.
OTC for 5 to 3 Aspect Ratio.......Correcting the 1280x768 resolution, 5:3 aspect ratio
OTC for 5 to 4 Aspect Ratio.......Correcting the 1280x1024 resolution, 5:4 aspect ratio
OTC for 8 to 5 Aspect Ratio.......Correcting the 1680x1050; 1440x900; 1280x800 resolution, 8:5 aspect ratio
OTC for 8.5 to 4.8 Aspect Ratio..Correcting the 1360x768 resolution, 8.5:4.8 aspect ratio
OTC for 16 to 9 Aspect Ratio......Correcting the 1920x1080 resolution, 16:9 aspect ratio
The main OTC mod correct the 4 to 3 Aspect Ratio that works for these resolutions:
1024x768
1152x864
1280x960
1360x1024
1600x1200
1792x1344
You won't need to add an optional "Aspect Ratio Mod" if using a 4:3 aspect ratio.
AND......Welcome to SubSim toche!!