CONTENTS 



Page 



Section I. INTRODUCTION 1 



1 . Wave Program at CERC 1 



2. Recording and Analysis 1 



3. Types of Wave Gages 2 



Section II. SERIES-TYPE, STEP-RESISTANCE GAGE FOR USE IN FRESH 



WATER 9 



1. Theory of Operation of Series-Type, Step-Resistance Gage .. 9 



2. Fabrication of Series-Type, Step-Resistance Gage 16 



3. Operation of a Series-Type, Step-Resistance Wave Gage ... 20 



Section III. PARALLEL -TYPE, STEP -RES I STANCE GAGE FOR SALT WATER . . 28 



1. Theory of Operation of Parallel-Type, Step-Resistance Gage 28 



2. Fabrication of a Parallel -Type, Step-Resistance Gage ... 34 



3. Operation of Parallel-Type, Step-Resistance Gage 40 



Section IV. RELAY-TYPE, STEP-RESISTANCE GAGE FOR SALT AND FRESH 



WATER • 45 



1. Theory of Operation of a Relay- Type, Step-Resistance Gage . 45 



2. Fabrication of a Relay-Operated Step-Resistance Gage ... 47 



3. Operation of a Relay-Type, Step-Resistance Gage 59 



Section V. PRESSURE-SENSITIVE GAGE 63 



1. Theory of Operation of Pressure-Sensitive Gage 63 



2. Fabrication of a Pressure-Sensitive Gage 64 



3. Operation of Pressure-Sensitive Gage 73 



Section VI. FABRICATION OF EPOXY GAGE SECTION 79 



Section VII. MAGNETIC TAPE RECORDER FOR OCEAN-WAVE GAGES 83 



1. Theory of Operation of Magnetic Tape Recorder 83 



2. Fabrication of Magnetic Tape Recorder 85 



3. Calibration and Operation 93 



Section VIII. MODIFICATION OF STRIP-CHART RECORDER SPEED 101 



Section IX. ANALYSIS OF OCEAN-WAVE GAGE RECORDS Ill 



1. Step-Resistance Wave Gages Ill 



2. Pressure-Sensitive Gages 116 



iir 



