I have been reading a book by Frank Cowper called sailing tours and I am puzzled any a reference to tides I was wondering if anyone would be able to help explain it. Frank wrote a serious of books
about sailing around the UK in the 1830's. They are an good read as he gives a description of the local history
for each area and talks about currents that current
sailing direction don't seem to cover. But I am stumped by a reference to high tide. I quote : it is high water
full and change at 10hours and 30 minutes local or 10 hours 47 mins Greenwich. I understand about the local and Greenwich time reference but 10 hours and 30 mins after what? There is nothing that says to refer to liverpool, Dover or anything like that. Does anyone have any ideas?
The area the book is referring to is Anglesey, north wales.