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Off-course alarm
Bowl-Bowl consists of a glazed expansion chamber. Painted white inside and outside grey. Bowl rotates in its holder and can be easily removed. On inside of bowl is a lubber rib which has a sensitised strip along length. It is set in gimbals.
Card-White domed float card with 10 degree section cut out. This section is set 5 degrees either side of rib.
There is a graduated ring on compass platform graduated 0-360 by degrees. There is a corresponding scale graduated W15-0-15E next to ring. There is an overhead arch on top of which is a cup for carrying corrector magnets. Set in own carrying box complete with wires, leads and a light.
Card-White domed float card with 10 degree section cut out. This section is set 5 degrees either side of rib.
There is a graduated ring on compass platform graduated 0-360 by degrees. There is a corresponding scale graduated W15-0-15E next to ring. There is an overhead arch on top of which is a cup for carrying corrector magnets. Set in own carrying box complete with wires, leads and a light.
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Object Details
| ID: | NAV0477 |
|---|---|
| Type: | Off-course alarm |
| Display location: | Not on display |
| Creator: | Lilley, J, & Gillie Ltd; Sperry Gyroscope Co |
| Vessels: | Kenya fl.1960 ? |
| Date made: | circa 1960 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 222 mm x 262 mm x 262 mm |