Tobermory tide gauge site

The tide gauge equipment is located in the Caledonian MacBrayne ferry terminal on Mishnish Pier, Tobermory, and the pressure points are located on one the pier legs as shown.
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Tide gauge location

The tide gauge equipment is housed in an instrument cabinet, and the pneumatic bubbler system consists of two full-tide and mid-tide pressure points, mounted on steelwork attached to one of the pier legs. All three pressure lines are monitored by the POL data logger.

Tide gauge location The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.

External users

There are currently no external users.

Site history

Pre 1979 – Lea gauge operational
1979 – The Lea gauge was replaced with an Ott punched tape recorder
1983 – Divers reported that the pier was no longer safe to use. All equipment was removed from site
1987 – New jetty was constructed. The DATARING system was installed with two full-tide bubblers and a datum probe
1992 – DATARING system removed during ferry terminal refurbishment
1993 – DATARING system refitted. New steelwork with two full-tide and mid-tide measuring systems installed
2004 – New data logger installed

Latitude56° 37.387'N
Longitude6° 3.853'W
Grid refNM 5079 5531
Earliest data1987
Tidal levels
HAT5.23 m
LAT0.16 m
MHWS4.61 m
MHWN3.42 m
MLWN1.94 m
MLWS0.77 m
H for 2024 5.23 m
L for 2024 0.20 m
H for 2025 5.11 m
L for 2025 0.23 m
MSR3.84 m
MNR1.48 m

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

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