ILLUSTRATIONS 



Tables Page 



I Resistance Values in Ohms for 20-Foot Gage for Fresh Water 12 



II Resistance Values in Ohms for 25-Foot Series Gage 13 



III Components for 25-Foot Five-Section Fresh-Water 



Series-Resistance Gage 15 



IV List of Components for Wave-Gage Holder 22 



V Resistor Values for Salt-Water Parallel Step-Resistance 



Wave Gage 31 



VI Components for Five-Section 25-Foot Parallel Resistance 



Gage for Salt Water 32 



VII Components for Five-Section 25-Foot Relay Staff Gage ... 55 



VIII Resistor Values in Ohms for 125-Point Relay Gage 58 



IX List of Components for Pressure-Sensitive Gage, Model BE-2. 66 



X List of Components for Magnetic Tape Recorder, LW-1 .... 86 



XI Parts Required for a Calibration Unit for Calibration of 



a Tape Recorder with a Strip-Chart Recorder 96 



Figures 



1. Block Diagram of Series-Type Step-Resistance Gage for 



Fresh Water 4 



2. Block Diagram of Parallel Step-Resistance Gage for Salt Water 5 



3. Block Diagram of Relay-Operated Step-Resistance Gage ... 6 

 4- Block Diagram of Pressure-Sensitive Wave Gage 7 



5. Series-Type, Step-Resistance Gage for Fresh Water 9 



6. Series-Type, Step-Resistance Gage for Fresh Water. 10 



7. Practical Circuit for Measuring Wave Heights in Fresh Water 14 



8. Series-Type Step-Resistance Wave Gage for Use in Fresh Water 17 



