Be advised: If you are not in the Cav discord, you're pretty much setting yourself up for failure. TONS of announcements, operations, and training classes are posted there. Do yourself a solid and get it set up.
Pro Tip #05: Your Vector-21 can be used to determine range from you to a point, distance and azimuth between two points, and elevation gain or drop between two points. It can also be used to determine range adjustments for bullet drop.