INFORMATION FOR BODC SERIES REF. NO.    33700                  
                         Sea Floor Pressure Gauge Inventory Number :   6943     
 Start Time : 03 Jun 1973 0000 GMT                  Latitude  :  51deg 02.9min N
 End Time   : 05 Jul 1973 2300 GMT                  Longitude : 006deg 56.6min W
 Nominal Cycle Interval   : 3600.0 secs         Sensor Depth    :     95.00m    
                                                Sea Floor Depth :     95.00m    
 Positional Uncertainty   : 0.1 to 0.5 n.miles                                  
 Depth Datum              : Chart reference                                     
 Data Category            : Offshore sea floor pressure series                  
 Instrument Type          : Tide gauge (unspecified)                            
 Instrument Mounting      : Sea floor - fixed                                   
 Originator Laboratory    : Proudman Oceanographic Laboratory, Bidston, UK      
 Originator's Identifier  : 731/973/154                                         
 Additional information stored with the data:                                   
    Station C, Celtic Sea.                                                      
    Clock gained 25 seconds over 34 days, 18.5 hours; the  cycle  interval  and 
    time  values  have  been  corrected.  An  interpolation program was used to 
    produce hourly values, on the hour, of the pressure record.                 
    Instrument characteristics and calibration factors                          
           OSTG Type 1, logger 41, sensor FM 4882/7                             
           Original sampling interval          15 minutes                       
           Integration period                        890s                       
           Temperature coefficient           37.01Hz/degC                       
           Pressure sensitivity at 8.4degC     0.977Hz/cm                       
           To convert pressure to elevation the following                       
           values should be used:                                               
           Density (from CTD casts)          1026.86kg/m3                       
           Gravitational acceleration constant  9.812m/s2                       
    Complete record of sphere temperature but sea temperature circuit failed on 
    deployment.  Temperature record was taken from bottom mounted current meter 
    and used for correction of frequency record.                                
 The following additional documents apply to this series:                                                 
  27728; Off-Shore Tide Gauge Type I    
  27731; I.O.S. Calibration and Data Processing of Off-Shore Tide Gauge Data