Quadratum nauticum
| Type: | Quadratum nauticum |
| Geometry: | Box |
| Unit of measurement: | Degrees |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 90 |
| Numbered: | every 10 |
| Repeats: | 8 times |
| Divided every: | 10 (Degrees) |
| then every: | 2 (Degrees) |
| Notes: | Each side of the square is numbered 0 to 90 from the centre to the corner |
Scale located on: Tympan, Womb or Back .