Range tracker

While learning Traveller I came across this video where he explains how to use a ruler to keep track of distances relative to other ships.

I liked the idea, but found a 20-inch ruler, just up to long range, a bit impractical. So I created this tracker.

I used black background and neon colors because I thought I would be playing with a VTT, but in the end I've only played in person. So I also have this PDF, in Ledger/Tabloid (11" x 17"). I don't think you'll find a printer that's able to print up to the very edge, so I'll let you decide if you'd rather scale it below 1" per square or just accept cropped stuff on the edges.