Mariners Astrolabe Astrolabio Aveiro Lisboa

Modeled after the Astrolabe Averio (c.a. 1575) currently in the Maritime Museum in Lisbon (based on photographs - I have not seen the actual instrument). Scale runs from 90 degrees (horizontal) to 0 (vertical) to 90.
Fully functional, snaps together, no fasteners required.
To measure the angle of the sun, hold it hanging freely to one side and adjust the pointer so that the light from one sight hole falls on the other - see photograph - do not look at the sun through the holes. Measures the angle in degrees from vertical.
To determine your latitude you measure the angle at solar noon (or withing a few minutes) then add (summer) or subtract (winter) the sun's declination from the reading on the scale.
For a star angle, you look through the holes in the pointer. If you sight Polaris (north star) subtract the scale reading from 90 degrees for your latitude.

Printed with 15% infill - changing this will change the front to back balance.

Parts:
Main body - supports needed for the mounting area.
Pointer - no supports needed
Center pin - I printed standing on it's head. I used a brim to make sure it didn't fall over.
Back wedge - has "ears" modeled so it will stand up.
SmallFPin and SmallMpin - two each required. Prints well standing on head. Snap together.
Ring - needs supports
U joint - also needs supports.