The Automatic Tide Marker Station
The tide marker station, called the 'Automatic Tide Signalling Apparatus' was actuated by the rise or fall of the tide or water level and by means of a float connected via wires to the marker station a code of light signals by night and a code of balls or like signals by day were automatically operated. Boyd was reimbursed by the Harbour Authorities the sum of £60.00 to cover his expenses in building the apparatus.
There was a manual system in the 1830s, Tom Tennant was the operator, based at a signal station on the top of sand hills. Tom hoisted balls to indicate the depth of water on the bar, and also acted as ferryman across the river.
Read more about this topic: Boyd's Automatic Tide Signalling Apparatus
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