Anonymous ID: 864aee Aug. 11, 2021, 4:14 p.m. No.81716   🗄️.is đź”—kun   >>1753 >>1757

>>81707

>Running RED

https://wonderfulengineering.com/this-is-why-they-use-red-lights-inside-submarines/

 

This Is Why They Use Red Lights Inside Submarines

 

The idea thatRedlight diminishes the ability to see in the dark is a myth. In fact, the presence ofredlight helps in the adjustment of vision. Not only submarines, but airport control towers, planetarium, and some movie theaters also useredlight so that it is easier for the viewer’s eyes to adjust from light to dark. The submarine crew needs to acclimate the eyes before going topside for the night watch. This vision adjustment is the primary reason for using theredlights.

 

One of the other reasons is to prevent light from being emitted from the raised periscope. Although the blackout blind covers the scope, yet, there is still a risk of light being emitted from the other end of the periscope. This light can be seen for miles and getting detected for a submarine could serve as havoc.