Declination
| Type: | Declination |
| Style: | Declination scale, north or south of the equator |
| Geometry: | Linear |
| Unit of measurement: | Degrees |
| (Numbering) starts at: | 0 |
| (Numbering) ends at: | 80 |
| Numbered: | Every 10 |
| Repeats: | 2 times |
| Divided every: | 10 (Degrees) |
| then every: | 5 (Degrees) |
| Notes: | The southern declination is graduated only to 23 1/2 degrees |
Scale located on: Rule, Alidade, Regular or Pointer .
Location(s) detail:
| Rule, left arm: | Scales found on the left arm of a rule or alidade. (Rule, left arm) |