View Full Version : Why did they switch to red lights inside the subs in real life?

05-13-2005, 03:54 PM
What was the purpose? If the sub was submerged, what difference does the light bulb color make? Nothing can see them anyway!

05-13-2005, 04:04 PM
It was used so that the watchmen's eyes would get used to the dark when they went up on the conning tower to scan for ships.

05-13-2005, 04:04 PM
Essentialy used for retaining your night vision. If you have to go up on the bridge for watch duty, it won't take as long for your eyes to adjust.

05-13-2005, 06:38 PM
Interesting...I never knew that!

05-13-2005, 07:26 PM
Retaining night vision is key. But, think of this. A periscope also works in reverse. If you had to submerge at night and use the periscope, (we all have had to at close range) a long wavelenght red light is much more difficult to spot than a gleaming white light 500M away... a merchant would see the inside of a brightly lighted control room from the head of the periscope. http://forums.ubi.com/groupee_common/emoticons/icon_cool.gif

First post, glad to be here.

05-13-2005, 07:31 PM
It was also so the crew who always remained inside the sub had a sense between day and night.

05-13-2005, 07:33 PM
The game goes way overboard with it. Before a night watch commenced, the watch crew would assemble for a period of time in the control room before going up. During this time, they switched to red lighting to acclimate their eyes to the dark. Certainly, though, they didn't switch to red lighting from sunset to sunrise, nor did they use red lighting in the radio shack, as depicted in the game. They also switched to red at the captain's discretion when viewing out of one or the other periscopes.

Check the directors cut or mini-series version of Das Boot, and you'll notice this practice clearly illustrated.