I should add that if the adjustment comes out negative, add 12.42 to
make it positive. Both Boston and Miami come out negative. Using the
NOAA HWI Greenwich Boston is 11.24. Miami (Government Cut) is 8.0 and
Biscayne Bay, only a few miles West, is 7.27. That illustrates the
effect of restrictions in tidal flow.

That is decimal hours BTW, not minutes.

Glenn Ashmore wrote:

Greenwich high water lunitidal interval (HWI) for the Atlantic City
station is 12.32 hours. You will need to convert to local time. Local
interval is Greenwitch - .069* Longitude in degrees For longitude 74º25'
: 12.32- .069*74.42 = 7.18

That is at the station. If you are located up a river or behind a
barier island you will have a local variation that may be significant.

You can get the intervals used by NOAA/NOS for all stations at:
http://www.co-ops.nos.noaa.gov/data_...e=100301000acc

Ted S. wrote:

I need the Lunitidal Interval (HIGH tide) for Margate, NJ. This is right
next to Atlantic City if Margate is not listed.

Could somebody tell me this bit of information or tell me how to find it?
I'm trying to program a watch for my father (it's a gift) and I don't
know
this one bit of information.

The manual says to use the time differential between the moon's
transit over
the meridian until HIGH tide, not low tide.

The manual lists 11:20 for Boston and 7:30 for Miami, so I assume the
correct value for Margate, NJ is somewhere between.

I would really appreciate the help or a better newsgroup to ask in.

Thanks

Ted




--
Glenn Ashmore

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