Sight tube

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Sight tube made from metal with glass lenses. The tube is attached to an arm.

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ID:	NAV1242.10
Type:	Sight tube
Display location:	Not on display
Creator:	Ramsden, Jesse
Date made:	circa 1792
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 17 mm x 31 mm x 178 mm
Parts:	Sextant with Artificial Horizon Sextant box (NAV1242.1) Bottle (NAV1242.2) Miscellaneous metal items (NAV1242.3) Bottle (NAV1242.4) Lamp (NAV1242.5) Attachment (NAV1242.6) Box (NAV1242.7) Telescope (NAV1242.8) Artificial horizon (NAV1242.9) Sight tube (NAV1242.10) Telescope bracket (NAV1242.11) Tangent screw (NAV1242.12) Sextant handle (NAV1242.13)