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PLA Hydrographic Service

The PLA Hydrographic Service provides a wide range of services to river users

Continuous monitoring of the river and estuary are essential to the safe navigation of the Thames. Regular surveys are completed of the tidal Thames from Teddington to the Outer Estuary. Many types of survey are carried out - main, periodic, engineering and berth surveys are all now produced digitally to improve efficiency and accuracy.

The PLA has the busiest hydrographic department in the UK. Find out more about the part our hydrography team play on the River Thames.
Contents include: Tide tables | Sunset times | Port Comms | Bridge Clearances | Distance Tables
We maintain 16 Tide Gauges and provide live and predicted tidal information
We produce a wide range of charts and other survey products
Bridge heights, survey data, chemical and physical analysis
Select your gauge
Animation showing the modelled tidal flows in Northfleet Hope.
Published surveys issued by the PLA Hydrographic Service