Gemini 5 Technical Debriefing, Part II, 1965

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3
Conrad
Yes
Cooper
I think this would be a tremendous benefit and
shouldn't be difficult to come up with.
Conrad
If you place your eye so that it goes through the
lower left corner of the right window or the lower
right corner of the left window and run that eye
position right through the front RCS yaw thruster,
the lower yaw thruster in the front ring, I guess
that's ring A, anyway, you take a line between
your eye, the corner of the window and the front
RCS yaw thruster, right through the middle of it,
and put that line on the top of the airglow or the
horizon.
Then the spacecraft, and this looks like
an excessively nose up attitude, but it's not,
you're zero degrees in pitch then the window frame
is just about vertical to the horizon and it forms
a perpendicular angle.
Cooper
The inside edge of the frame .
Conrad
The inside up and down edge of the window corner
makes a perpendicular angle to the horizon and you
can use that as a roll gage. If you set it up