The horizon glass was a half mirror that was not at all difficult to use.
I'm not sure what you are referring to regarding "picture a sunset at
LAN" if you are talking about the brightness of the sun, shade glasses
took care of that. As for dipping the sight at the time, swinging the
sextant solved that issue.
G My sextant may now be considered an antique, but it's still probably
one of the best instruments built .... still has original mirrors.

otn

Simple Simon wrote:
Some of the older model sextants used half mirrors instead
of the modern see-through mirrors that make it possible to
have the sextant picture a sunset at LAN. The older
sextants were harder to use.

You being old and retired, I figured you'd probably have
some antique instruments.

S.Simon