UNCLASSIFIED 



Security Classification 



DOCUMENT CONTROL DaTA -R&D 



(Security claasiltcation of title, body of abstract and indexing annotation must be enterod whon tho 



all report l« clatallled) 



INS ACTIVITY (Corporate author) 



Coastal Engineering Research Center (CERC) 

 Corps of Engineers, Department of the Army 

 Washington, D. C. 20016 



REPORT SECURITY CLASSIFICATION 



UNCLASSIFIED 



2b, CROUP 



REPORT TITLE 



CERC WAVE GAGES 



4. DESCRIPTIVE NOTES (Type of report and Incluelve datea) 



B. AUTHOR(Sl (Flrat name, middle Initial, laat name) 



Leo C. Williams 



e- REPORT DATE 



December 1969 



7a. TOTAL NO. OF PASES 



124 



76. NO. OF REFS 







CONTRACT OR SRANT NO. 



6. PROJECT NO. 



ORISINATOR'S REPORT NUKTBERIS) 



Technical Report No. 30 



9b. OTHER REPORT NO(3> (Any other numberB that may be aaalgned 



10. DISTRIBUTION STATEMENT 



This document has been approved for public release and sale; its distribution 

 is unlimited. 



11. SUPPLEMENTARY NOTES 



ITARY ACTIVITY 



13. ABSTRACT 



CERC has used wave gages to gather prototype wave data since 1948. Two 

 basic types of gages are now used in the field - the step-resistance staff 

 gage and the underwater pressure-sensitive gage. CERC has developed three 

 types of step-resistance staff gages - a series type for use in fresh water, 

 a parallel type for use in salt water, and a relay-operated type for use in 

 either fresh or salt water or in water where wide changes in salinity occur. 

 The pressure gage can be used in water of any salinity. The series and 

 parallel gages have an accuracy of ±5 percent plus the spacing of one sensor 

 increment. The relay gage has an accuracy of ±2 percent plus the spacing of 

 one sensor increment. The accuracy of the pressure-sensitive gage is not as 

 precise as that of the step-resistance gages. The report describes each gage 

 and the theory of operation, details of fabrication, steps for calibration 

 and installation, and requirements of maintenance. 



DD 



FOIM 



( MOV •• 



1473 



U.XCLASSIFIED 

 Security ClatsificaUon 



