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Sector
sector. Folds out straight. Scales marked 'tan', 'cho', 'sin', 'lin', 'sec', 'poll'
Graduations: On upper surface, from top, 0-7. "Sin" 0-90 "Sin". 0-10 "Lin". 10-76 "Sec" 12-4 "poll. 12-4 "Poll". 10-76 "Sec". 20-90 "sin". 0-10 "LIn". "Tan" 0-60. 7-90 "Sin". 7-55 "Tan". On reverse surface "Rhumb" 1-10. "Ho" 0-6. "Cho" 0-90. 0-45 "Tan". 20-60 "Cho 10-75 "Tan". 10-75 "Tan". 20-45 "Tan". 0-60"Cho". "Lat" 0-90. "IM" 0-90. 0-10. On upper edge 6-12. On lower edge 0-6.
Graduations: On upper surface, from top, 0-7. "Sin" 0-90 "Sin". 0-10 "Lin". 10-76 "Sec" 12-4 "poll. 12-4 "Poll". 10-76 "Sec". 20-90 "sin". 0-10 "LIn". "Tan" 0-60. 7-90 "Sin". 7-55 "Tan". On reverse surface "Rhumb" 1-10. "Ho" 0-6. "Cho" 0-90. 0-45 "Tan". 20-60 "Cho 10-75 "Tan". 10-75 "Tan". 20-45 "Tan". 0-60"Cho". "Lat" 0-90. "IM" 0-90. 0-10. On upper edge 6-12. On lower edge 0-6.
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Object Details
| ID: | NAV0156 |
|---|---|
| Type: | Sector |
| Display location: | Not on display |
| Creator: | Rowley, John |
| Date made: | circa 1710 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 3 mm x 164 mm x 34 mm |