Berekening uitgevoerd door de dienst Mathematisch Model van de Noordzee

Dear M. Decoussemaker,

We do have the tide table for the 17/07/1831.

We can however recompute approximately time (UTC) of HW and LW at Oostende
for the particular
date. Our results are:

HW at 05:40 am
LW at 11:55 am
HW at 18:10 pm

Hope this reply to your request.

Best regards