As soon as you see two Signal Detected notifications, it's time to jump into stealth mode. Head in the only direction you can the doors will open for you automatically. With the weapon equipped, you can see the amount of charge in the bottom right of your HUD. Charge it the same way you do the Laserkraftwerk, or even pick up batteries from fallen enemies. Tip: Your Assault Rifle is now equipped with a Laser and runs on a battery. Be sure to pick up the Marksman Rifle Upgrade: Laser before you continue on your way. Use the button on the desk to release the door and then kill the three guards outside. Inside you should find several more useful items, including a Handgun. Use your Laserkraftwerk to cut a hole in the thin metal just below the charge unit on the wall. When they do, crouch and sneak into the conveyer belt and find your Laserkraftwerk in the next room, along with a Gold Cane and several other useful items. Salute the soldier who greets you and then wait for everyone to turn their backs. Once you're through the x-ray machine, you'll be at the baggage area. In fact, you can walk right past one of those nasty Kampfhunds blocking your path. You're disguised as one of the Nazi scientists, so nobody will suspect you of bad intentions. When the chapter begins, you can walk around without fear of being seen.

Wolfenstein the new order soldier