Portpatrick tide gauge site
The tide gauge building is mounted over the stilling well in the corner of Portpatrick harbour. The pneumatic pressure points are
located directly beneath the building.
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Tide gauge location
The tide gauge equipment is housed in a GRP building and consists of a pneumatic bubbler system with a single full-tide pressure point mounted on steelwork attached to the stilling well. The Munro float gauge is mounted above the stilling well inside the building. The potentiometer output from the Munro and the pneumatic pressure line are monitored by the POL data logger.
The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.
External users
Sea level pressures and/or elevations from this site, levelled to the National Geodetic Network, are supplied to the following authority:
- Portpatrick Harbour
Site history
1964 – Lea gauge installed
1989 – Lea gauge removed due to site refurbishment
1990 – GRP tide gauge building erected
1990 – DATARING system installed with a single full-tide bubbler, a Munro float gauge and a datum probe
2002 – POL data logger installed
Location | |
Latitude | 54° 50.553'N |
Longitude | 5° 7.201'W |
Grid ref | NW 9976 5421 |
Earliest data | 1964 |
Tidal levels | |
HAT | 4.32 m |
LAT | -0.07 m |
MHWS | 3.86 m |
MHWN | 3.19 m |
MLWN | 1.16 m |
MLWS | 0.44 m |
H for 2023 | 4.25 m |
L for 2023 | 0.00 m |
H for 2024 | 4.27 m |
L for 2024 | -0.07 m |
MSR | 3.42 m |
MNR | 2.03 m |
Abbreviations
HAT – highest astronomical tide
LAT – lowest astronomical tide
MHWS – mean high water springs
MHWN – mean high water neaps
MLWN – mean low water neaps
MLWS – mean low water springs
H – highest for year
L – lowest for year
MSR – mean spring range
MNR – mean neap range
Measurement devices
Tide gauge systemsFull-tide bubbler
Half-tide bubbler
Direct pressure transducer
Tide gauges
Ott pneumatic gauge
Munro float gauge
Wellhead float gauge
Lea float gauge
Instruments
DATARING logger
Datum probe