TABLE OF CONTENTS 



Page 



ABSTRACT 1 



ADMINISTRATIVE INFORMATION 1 



INTRODUCTION . 1 



GENERAL CONSIDERATIONS 2 



PRINCIPLES OF OPERATION 2 



BUOY EVALUATION MEASUREMENT SYSTEM 5 



AUTOMATIC DEPTH-KEEPING SYSTEM 8 



BUOY OPERATIONS MEASUREMENT SYSTEM 13 



SYSTEMS DESCRIPTION 13 



BUOY EVALUATION MEASUREMENT SYSTEM 15 



Buoy Instrumentation 15 



Towcable 17 



Shipboard Sensors 17 



Data Center Instrumentation 18 



AUTOMATIC DEPTH-KEEPING SYSTEM 19 



BUOY OPERATIONS MEASUREMENT SYSTEM 20 



BUOY EVALUATION MEASUREMENT SYSTEM ACCURACY 20 



CALIBRATION PROCEDURE 22 



DATA REDUCTION PROCEDURE 29 



EVALUATION EXPERIMENTS 30 



CONCLUSIONS 33 



REFERENCES 34 



LIST OF FIGURES 



1 - General Towing Configurations with Antenna Folded 



or Erect 4 



2 - Block Diagram of the Buoy Evaluation Measurement 



System 6 



3 - Partial Schematic of Buoy Instrumentation 7 



4 - The BIAS Buoy 9 



5 - Simplified Schematic of the Automatic Depth-Keeping 



System 11 



