What I can tell from this picture is that He is about to go night vision and stealthing:
“ Bravo six, going dark” This is not an actually military coms transaction for that moment (some squads have it as their “own language”) but saying that to the HQ will not help. Going dark actually means cut the comms. Saying your are not able to listen and talk at the moment. Sneaky beaky means going stealth and noone can know about it. Soo yeah. (Or that is what you meant)