Those colored scales around the chronometer are scales to determine speed of a target, as they pass the line of your periscope. The full procedure is a bit more involved than just looking at the target though. (you need to eliminate the effect of your own speed) The colored circles represent a certain length of the target. After the needle has moved X seconds it points to the appropriate speed for the length of that color (100m, 150m or 200m). If the actual ship has a different length you need to chose the color that best fits, or multiply/divide appropriately. But I found a way to (ab)use that range/AOB finder wheel in calculating the speed for any length of ship. See that crooked mark next to the 60 degrees in the inner (AOB) scale?
Pisces,
Can you advise me where I can download a plain chronograph similar to the chrono used by Friedl9te's video on OLC attach solution?
Thank.
Harryt8
