81 



CHAPTER IX. WAVES 

 CONTENTS 



Page 



General 83 



Wave Direction 84 



Wave Period 84 



General 84 



Observation 84 



Wave Height 85 



General 85 



Determination , . 85 



Coding and Entries of Wave Data on Form 615-5 86 



General 86 



Direction (d^d^) 87 



Period (P^) 88 



Height (H^) 88 



Wave Group 90 



CODE TABLES 



Code Table 4. Symbol d-^^d^ --Direction from Which Waves 



Are Coming 87 



Code Table 17. Symbol P^ --Period of Waves 88 



Code Table 18. Symbol H^--Height of Waves 89 



FIGURES 



Figure 11. --Section of a Trace from a Wave Recorder 83 



Figure 12, --Wave Length and Height 85 



