The Lenthall Course Delineator
Transparent celluloid rectangular instrument. At one end is a radial protractor scale 0–90–0–90–0. Along the centre is a 125 mm slot with one end at the centre of the protractor scale and of width to accept a pencil point, with scale divided into tenths.
Inscriptions:
The Leanthall Course Delineator
Patent No. 12631 09
Heath & Co Ltd London
Contained in a mahogany box with sliding lid, with receptacle for a pencil. The box also contains a folded sheet of paper with pencil marks.
Instruction book: 98 x 150 mm booklet of 32 pages in red paper covers, giving instructions for various navigational tasks.
Inscriptions:
The Leanthall Course Delineator
Patent No. 12631 09
Heath & Co Ltd London
Contained in a mahogany box with sliding lid, with receptacle for a pencil. The box also contains a folded sheet of paper with pencil marks.
Instruction book: 98 x 150 mm booklet of 32 pages in red paper covers, giving instructions for various navigational tasks.
Object Details
| ID: | NAV0096 |
|---|---|
| Type: | Course indicator |
| Display location: | Not on display |
| Creator: | Heath & Co. Ltd |
| Date made: | 1909 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | 188 mm x 102 mm; box: 210 x 130 mm |