View attachment 71785
Anyone know what this is?
It's on a boat I'm about to go look at. Would be nice to know what it is in advance.
Cheers.
I can though !In what way?
Loads of people make things called "tide clocks", but I can't find any suggestion that the Prosser one mentioned in that thread has anything to do with the unit in the OP's image.
Pete
In what way?
Loads of people make things called "tide clocks", but I can't find any suggestion that the Prosser one mentioned in that thread has anything to do with the unit in the OP's image.
Pete
They were on sale around the turn of the century ../..
Tidal information is computed from astrological constants
Turn of which century?![]()
I can though !
It is indeed a Prosser Tide Clock. They were on sale around the turn of the century for £160
It displays the time of day, current tide height and flow direction for the port selected, The time relative to HW can also be selected for use with tidal stream charts. Data for up to 500 ports is pre-programmed into memory. Tides for any date in the future are displayed by either stepping through the next high and low waters or by scrolling through the tide height information. Tidal information is computed from astrological constants and shallow water corrections for each port. The water height at any state of tide is automatically predicted for all the available ports. Operation can be from a 9 v battery or external 12 volt DC supply, the clock uses an internal battery with five years life