I knew I remembered some problem with the old red-light advice, and found
this reference: www.aoa.org/clincare/aviation-night.asp The problems wasn't
what I thought it was, but the site contains a large amount of fascinating
information about night vision.

One of the problems it mentions regarding red light is that you might not be
able to see red things on your chart. Are any important things on charts
colored red? Red light is also harder to focus on in dim conditions, esp. as
we grow middle-aged and our "arms shorten."

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Charles T. Low
www.boatdocking.com

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"Dave" wrote in message
news
On 10 Nov 2004 11:55:08 -0800, (Parallax) said:

For example, I did not have a small
flashlight for taking a quick peak at the chart so I was blinded for
about 30 secs after every time I looked at it

The trick there is to use, not necessarily a small light, but a red light.
When I was doing night sailing I used to have a red plastic disk I could
insert above the flashlight lens.

Dave