diagram of a marine sextant used for observing heavenly bodies
<a href="//commons.wikimedia.org/wiki/User:Alvesgaspar" title="User:Alvesgaspar">Joaquim Alves Gaspar</a>, <a href="//commons.wikimedia.org/wiki/User:Shubham_Suresh_Pudage" title="User:Shubham Suresh Pudage">Shubham Suresh Pudage</a>
CC BY-SA 4.0
This file has been <b>extracted</b> from another file