I‘m still new to the game, but I‘ve picked up a few tips on how to keep noise and light discipline.
1: use a red filter on your flashlight, but get a second red one and cut a small hole in the middle so that a small amount of white light filters through. This helps for reading maps.
2: If you need to use a flashlight, try as much as possible to keep it pointed down. Even with a filter on, our angle neck flashlights cast a beam that can be seen for at least a km. If you try to keep it pointed down, the light stays right in front of you and doesnt get blasted across the horizon.
3: This really applies in the artillery. When working as a group (in a gun det for example), only one person should have a flashlight on. It masks the number of people you have and minimizes the chances of being seen.
4: To reduce noise as much as possible, try to maximize the use or radios. Our unit uses motarolas and 521‘s at night to avoid any kind of yelling.
5: metal on metal has to be one of the loudest sounds you can make. A metal on metal percusion at night can travel forever. Try not to slam doors or tailgaits, or even dragging metal objects around in the back of an ML or HL.
6: something kinda basic here, establish a track-plan when light is good, so that at night you can walk around without using any light at all. This may seem common sense, but you wouldnt beleive how well it works.
I hope that helps, it‘s nothing special, and it may seem like common sense to most people, but it works.