The third error is error of perpendicularity. It occurs when the index mirror is not set perpendicular to the plane of the sextant. It is checked in the way that Tom describes, but is not due to a flaw in the arc. There is an adjustment screw for it on the index mirror. Dear, dear, Tom!
The third error is error of perpendicularity. It occurs when the index mirror is not set perpendicular to the plane of the sextant. It is checked in the way that Tom describes, but is not due to a flaw in the arc. There is an adjustment screw for it on the index mirror. Dear, dear, Tom!
WillieTBoilsooker 7 months ago
lol he sed secks
mungomillion 7 months ago
This video is spectacular and this man is an inspiration!
squeeks1234 7 months ago