Tidal computer
        
        Tidal computer.  Dryad list describes this as a North Sea Tidal Index.
              
      
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Object Details
| ID: | NAV0206 | 
|---|---|
| Type: | Tidal computer | 
| Display location: | Not on display | 
| Creator: | John Lilley & Son Ltd | 
| Date made: | circa 1880 | 
| Credit: | National Maritime Museum, Greenwich, London | 
| Measurements: | Overall: 10 mm x 328 mm x 380 mm | 
