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NP122(3) Admiralty Tidal Handbook No.3, 1986
*** Canceled, with no replacement on 8 Jun 2017
| Admiralty Chart Catalogue | Admiralty Publications | |
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NP122(3) Admiralty Tidal Handbook No.3, 1986 - The Admiralty Method of Harmonic Tidal Analysis for Short Period Observations
NP 171 was revised in 1981. The present revision of the handbook takes account of changes in Form NP 171 at the time. Concurrently with this revision Form NP 171(a) has been introduced containing sections for alternative methods of performing this anlysis and for the obtaining of quarter - diurnal shallow water corrections as required for prediction by the Simplified Harmonic Method.
The revision of both forms and handbook was carried out by Lieutenant Commander A G Merriman, MNI, RN (Retd).
| Contents | ||
| Preface | ii | |
| Contents | iii | |
| Introduction | iv | |
| Greek Alphabet | v | |
| Chapters:- | ||
| 1 | Requirement for, and Brief Description of, this Analysis | 1 |
| 2 | Contouring and Application of Stencils | 5 |
| 3 | Mean Level and Shallow Water Corrections | 8 |
| 4 | Tidal Angles and Factors | 11 |
| 5 | Pairs of Columns- Solution by Simultaneous Equations | 14 |
| 6 | Pairs of Columns- Approximate Solution | 18 |
| 7 | Use of Inferences from and Adjacent Solution | 21 |
| 8 | Tidal Streams | 26 |
| 9 | Means. Assessment of Results | 27 |
| 10 | Use of Computers | 30 |
| Tables:- | ||
| 1-17 | See ATH(1) | |
| 18 | Derivation of Stencils | 33 |
| 19 | Constants used in Compilation of Tidal Angles and Factors | 34 |
| Examples:- | ||
| 1 | Semi-diurnal (Rosyth) - Full Contour Sheet | 38 |
| 2 | Semi-diurnal (Rosyth) - Single Day | 40 |
| 3 | Diurnal (Labuan) - 4 consecutive days | 42 |
| 4 | Diurnal (Labuan) - 2 separate days | 44 |
