APPENDIX C. DESCRIPTION OF AN OCEANOGRAPHIC DATA 

 SYSTEM FOR SUBMARINES 



Quick Carlson 



A. INTRODUCTION 



This specification describes a system incorporating components 

 which already have been tested aboard the USS REDFIN. A prototype 

 of this system underwent sea trials aboard the USS REDFIN in May 

 I960 and now is operating at the U. S. Navy Hydrographic Office. 



The system is completely digital and semiautomatic in operation. 

 Its output is punched paper tape or a digital readout with visual dis- 

 plays of all variables. All outputs are in absolute units and are cor- 

 rected for various non-linearities and transducer calibration factors. 

 The system utilizes no direct inputs from any system aboard the sub- 

 marine and, therefore, will require periodic attention for the manual 

 introduction of position data. 



B. REQUIREMENTS 



The system has three modes of operation. Each mode is associated 

 with a general submarine maneuver. 



1. Mode 1 (Routine) 



This mode is for periodic sampling of the environment while the 

 submarine is underway submerged and is shown in Figure C-l. Vari- 

 ables to be recorded include: (1) Time, (2) day of the year, (3) octant 

 of the globe, (4) latitude, (5) longitude, (6) depth of the submarine, 

 (7) sound velocity, and (8) sea temperature. 



2. Mode 2 (Diving) 



This mode will be switched on before vertical dives. The vari- 

 ables to be recorded are the same as those in Mode 1 except that 

 speed and ambient light level are recorded instead of position. These 

 variables are shown in Figure C-2 and include: (1) Time, (2) day of the 

 year, (3) speed, (4) ambient light, (5) depth of the submarine, (6) sound 

 velocity, and (7) sea temperature. 



3. Mode 3 (Hovering) 



This mode is shown in Figure C-3 and will be used to obtain 



C-l 



