E1 Autonomous Buoy

As part of the NERC Oceans 2025 programme in 2007, PML were awarded a capital grant to build autonomous buoys for the long-term stations at L4 and E1. Originally both L4 and E1 were populated by the same design design buoy constructed by Hippo Marine with systems design and integration carried out by PML. However, during 2012 the opportunity arose to collaborate with the UK Met Office who were rolling out a new hull design to replace their 30 year old K-series. At E1 the hull, moorings, meteorological and wave sensors (these integrated using a Watchman Axis logging unit) are now provided by the Met Office and the in-water sensors by PML. The in-water measurements include: sea surface temperature, salinity, oxygen, turbidity, fluorescence (WetLabs WQM)); CDOM fluorescence (WetLabs); nitrate (Satlantic Suna) and a PAR sensor (Satlantic). Both systems report to shore hourly using Iridium Short Data Burst format. The E1 buoy normally reports current position using AIS. The latest in-field data are shown in the table below.


E1 Databuoy

Webcam E1 image

Latest Buoy Position

Latest E1 data readings (50°02.6'N; 4°22.5'W)

Buoy automatic position given as DD.dd where:

DD degrees, dd decimal degrees

Latitude: 50.044 °Longitude: -4.373 °
Wind direction: 266.0 °Sea temperature: 14.7 °C
Wind speed: 10.0 ms-1Salinity: -10.00
Pressure: 1011 mb Oxygen: -999.9 μM
PAR: -10 W m-2Chlorophyll: -10.00 mg m-3
Air temperature: 15.2 °CTurbidity: -10.00 NTU
Sig. wave height: 2.0 mMax. wave height: 3.00 m
Peak wave period: 9.5 sWave Direction 248 °

Last Reading taken at: 8.00 GMT on 26/05/2024

* Readings of -10 indicate missing data

Click here to download preliminary data. Final, quality controlled data are available on request. The meteorological parameters for this buoy are also available from the UK Met Office

Last 7 days met data

Windspeed and direction

Windspeed and direction chart


Pressure chart

Air Temperature and Humidity

Air temperature and PAR chart

Wave Height

Waves height chart

Wave Period

Waves period chart

Latest year in context

Temperature and Salinity

Temperature and Salinity chart

Oxygen, Fluorescence and Turbidity

Oxygen, Fluorescence and Turbidity chart

Nitrate and CDOM

Nitrate and CDOM chart

The WCO is a partnership between Plymouth Marine Laboratory and The Marine Biological Association.