[Felix The Assassin]

Other friendlies? It's called AFVID (armored fighting vehicle identification) it's part of every day tanker life.

The VS-17 panel is florescent orange, measures about 3ft by 6ft. They are tied across the top,back of our armored vehicels for friendly air to see in a combat environment.
In training their are used for priority CASEVAC for the medical and logistical folks to see.
They cannot be missed, day or night, they emite a very eerie glow under night vision optics.

I'm a tanker, if I miss with a multi thousand dollar depleted uranium round, fired from a multi million dollar fire control system, then we have a problem. Even on the gunnery range where training ammo is not too expensive, to miss or worse, not qualify, can lead a tank crew to a new job field = Infantry! So, no I have not missed.

Now the 9mm range is a whole different story.