Declination
| Type: | Declination |
| Style: | Outwards from centre |
| Geometry: | Linear |
| (Numbering) starts at: | 20 |
| (Numbering) ends at: | 90 |
| Numbered: | every 15 |
| Repeats: | 1 times |
| Divided every: | 15 (None) |
| then every: | 3 (None) |
| Notes: | The numbers engraved on this scale are distinctly different from those on the rest of the instrument. |
Scale located on: Rule, Alidade, Regular or Pointer .
Location(s) detail:
| Rule, right arm: | Scales found on the right arm of a rule or alidade. (Rule, right arm) |