The northern stars of navigational astronomy.
U.S. <a href="//commons.wikimedia.org/w/index.php?title=National_Imagery_and_Mapping_Agency&amp;action=edit&amp;redlink=1" class="new" title="National Imagery and Mapping Agency (page does not exist)">National Imagery and Mapping Agency</a>/<a href="//commons.wikimedia.org/wiki/User:Haus" title="User:Haus">User:Haus</a>
SVG drawing by <a href="//commons.wikimedia.org/wiki/User:Haus" title="User:Haus">User:Haus</a> in Inkscape based on public domain picture: Fig 1532a of <a href="https://en.wikipedia.org/wiki/The_American_Practical_Navigator" class="extiw" title="en:The American Practical Navigator">en:The American Practical Navigator</a>.