NavList:

I want to say hello and introduce myself. I have been interested in celestial navigation for many years. In the past I have played with a plastic Davis sextant and a artificial horizon. I finally decided to get a metal sextant and study this in greater detail. To that end I have joined this list and am scheduled to take the introductory class that Frank Reed holds at Mystic. I look forward to becoming more knowledgeable in this field.

Anyways let me get to my questions. I purchased a Navy Mark 2 sextant on Ebay for not much money at all and was very pleased to find that it is 100% there. Including a spare index mirror and horizon mirror. The only thing missing is the lid of the box the sextant is stored in.  I took it this weekend and did some sun shots with it. This sextant has adjustable polarization filters. Being a amateur astronomer I am very aware of eye safety and viewing the sun. Common wisdom is that this type of filter is not eye safe. However I am aware that filters on sextants don't seem to follow with what is taught in the astronomy field. Now with the filters adjusted to maximum darkness the sun still seemed to be to bright for me to be comfortable doing it.

I guess I have 2 questions. Is this type of filter safe to use and assuming that these are the original filters could they have degraded with age. I have contacted the Robert White Company in Boston and have gotten pricing on overhauling this sextant and replacing the filters with new polarizers.  But would like to have input from the folks on here about this subject.

Thanks in advance!!!!