Critical Depths
The following links lead to the Critical Depths information and Estuary Tidal Reductions published by the PLA Hydrographic Service.
To download these files you need 
www.pla.co.uk/navigation 11/02/2012
The following links lead to the Critical Depths information and Estuary Tidal Reductions published by the PLA Hydrographic Service.
To download these files you need