Boyd's Automatic tide signalling apparatus
The automatic tide signalling apparatus or Pilot House at Irvine harbour in North Ayrshire, Scotland, is a category B listed building, and is probably unique, having been invented and patented by Martin Boyd, the Irvine harbourmaster, in 1905 and opened in 1906. == Introduction == The Port of Irvine is situated on the Clyde Coast, sited next to the River Irvine and dates, in its present location, from circa 1677, although a military report describes a port in 1566 and by inference one was present in 1514 when the Aldermen and Bailies of Irvine were ordered by the Crown to make ships and crews available for a military expedition against Donald of the Isles.
Source: Wikipedia — Boyd's Automatic tide signalling apparatus (CC BY-SA 4.0)