This blown-up screenshot shows one of the early HUDs that id Software had considered for DOOM. As you can see
from the status windows, DOOM was originally going to be a more complex game that what it turned out to be.
What you would need the Captain's Hand for is a mystery. Maybe you used it with The Heart Of Lothar.
While the HUD may look very busy, it severely reduces the amount of screen real estate that must be updated
with each frame. The "viewscreen" has the dimensions of 240x144 pixels, resulting in a total of 34,560 pixels,
only 54% of the 64,000 pixels needed to fill a 320x200 fullscreen image. On slower systems this would have
greatly increased the framerate of the game.
The images below are full-sized 320x200 screenshots, not thumbnails.