Oh I know that the real binoculars didnt have such a thing, but to me it fits in because of the limitaions that a computer simulation has in that you dont have the peripheral vision and ability to see out the corner of your eye even with binoculars held up to them. And can in that way have some sense of what direction you are looking in. But in SH's binocular view you have no such visual reference unless you look dead ahead and can see the bow's upper cable cutter.
Swing to one side and it's sorta hard to tell how far off center you have swung.
So something of this nature would help, even if it were to make the black background somewhat transparent. This would reatain realisim giving somewhat a simulated peripheral vision. IE: You could then see the sides of the conning tower through the black background, and thereby know about what direction you were looking.
Because you can when looking through a pair of binoculars still see objects and things around adjacent to you with your naked eyes.
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"Chance favors the prepared mind"
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