Admiralty Tide Tables. NP201A. Volume 1A. 2019. United Kingdom. English Channel to River Humber (Including Isles of Scilli, Channel Islands and European Channel Ports)

Nine regional volumes provide comprehensive details and world-wide coverage of tidal data. New editions are published annually.

Vol. 1A: General arrangement
The introduction deals with a number of subjects of general interest, in particular the effect of meteorological conditions on tidal heights; following the introduction are a number of special tables and diagrams for use with the tide tables.
Part I of these tables gives daily predictions of the times and heights of high and low waters at a selected number of Standard Ports. The list of Standard Ports is given at the front of the book. Included with each set of predictions for Standard Ports is a diagram to facilitate the calculation of heights at times other than high and low water. An explanation of the use of these diagrams is given in the Instructions for the use of the Tables. Note that diagrams are not available for Truro and Darnett Ness due to limited source data.
Part Ia gives hourly height predictions for Plymouth (Devonport), Poole, Southampton, Portsmouth and St. Helier.
Part II gives data for prediction at a large number of Secondary Ports; this is in the form of time and height differences, referred to one of the Standard Ports in Part I.
Part III gives the harmonic constants for use with the Simplified Harmonic Method of Tidal Prediction. In those cases where harmonic constants are given two alternative methods of prediction are available.
The symbols for the New and Full Moon, First and Last Quarter are shown in the Standard Port daily predictions on the days on which they occur.

Contents
Index to Standard Ports in Part I
Preface
Purpose
Related ADMIRALTY Publications
ADMIRALTY Digital Publications (ADP) - ADMIRALTY TotalTide
Diagram showing limits of ADMIRALTY Tide Tables
Introduction
Methods of Prediction: Tidal Levels: Meteorological Effects on Tides: Negative Surges: Shallow Water Corrections: Seasonal Changes in Mean Level: Seasonal Variations in Harmonic Constants: Zone Time and Time Differences: Tidal Streams and Currents: Tidal Data on ADMIRALTY Charts: Datums of Tidal Predictions: Height Differences: Seismic Sea Waves: Supplementary Tables
Instructions for the use of Tables
SUPPLEMENTARY TABLES
Table I: Conversion Table - metres to feet
Table II: Multiplication Table
Table III: Height of Chart Datum relative to Ordnance Datum in the United Kingdom
Table IV: Height of Chart Datum relative to the Land Levelling System in countries outside the United Kingdom
Table V: Part I Tidal levels at Standard Ports, Authorities, methods of prediction, etc. (with notes)
Part 2 Highest Astronomical Tide Levels (HAT) at SecondaryPorts
Table VI: Fortnightly Shallow Water Corrections
Table VII: Tidal Angles and Factors
Table VIII: Orbital Elements
PART I
Predictions of high and low water for Standard Ports (with diagrams to facilitate prediction at times between high and low water for all Standard Ports)
PART Ia
Hourly height predictions
PART II
Non-harmonic data
Notes on Part II
PART III
Harmonic Constants
GENERAL
Geographical Index
List of tidal publications
Diagram showing direction of main flood stream
Certificate of Authenticity ...