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Navigational computing instrument
Navigational computing instrument with two paper charts and two manuals.
Azimuth & time proof plate. Copper printing plate 317 x 241mm. Two pamphlets(1858 & 1878). Printed sheet. Printed card. The Sun's true azimuth can be read off at a glance for any altitude throughout the day: and when an altitude cannot be obtained, the approximate time from noon will answer the same purpose.
"The sun's true azimuth can be read off at a glance for any altitude throughout the day; and when an altitude cannot be obtained, the approximate time from noon will answer the same purpose."
Azimuth & time proof plate. Copper printing plate 317 x 241mm. Two pamphlets(1858 & 1878). Printed sheet. Printed card. The Sun's true azimuth can be read off at a glance for any altitude throughout the day: and when an altitude cannot be obtained, the approximate time from noon will answer the same purpose.
"The sun's true azimuth can be read off at a glance for any altitude throughout the day; and when an altitude cannot be obtained, the approximate time from noon will answer the same purpose."
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Object Details
| ID: | NAV0129 |
|---|---|
| Type: | Navigational computing instrument |
| Display location: | Not on display |
| Creator: | Thomson, William |
| Date made: | 1858 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 1 mm x 315 mm x 241 mm |