AN INVESTIGATION OF THE RED ILLUMINATION OF THE SUBMARINE CONNING TOWER
Interval rept. no. 1
NAVAL MEDICAL RESEARCH LAB NEW LONDON CT
Pagination or Media Count:
A series of experiments on conning tower illumination was undertaken to determine the extent to which laboratory findings on the effect of dim red light upon night vision may be duplicated in a practical situation. Such experiments were considered necessary not only because available data on dark adaptation indicated that some decrement in night vision performance might be expected, but also such a decrement, although small, has been found in the absolute visual threshold. This decrement, experimentally induced by a uniformly illuminated field, and measured by a precise technique, might be expected to appear in a non-uniformly illuminated space such as a conning tower, when the performance in question is one which is affected by many other factors than the state of the adaptation of the retina. It is the present problem to determine whether or not it does. A performance simulating the visual task of an officer at the periscope was therefore measured under three conditions of conning tower illumination. This performance was the detection of the position of a target in the dimly illuminated field of a simulated periscope.
- Submarine Engineering