How to estimate distance in War Thunder

Vehicle using in this video is BMD-4 with low velocity HE shell (3OF32 and 3OF70) Feel free to leave any questions in the comment. Link for the custom sight: Background music: Spring In My Step – Silent Partner 00:00 - Intro 00:20 - Method 1 01:49 - Method 2 03:29 - Method 3 06:06 - Method 4 07:19 - Outtro