INFORMATION FOR BODC SERIES REF. NO.    34094                  
                         Sea Floor Pressure Gauge Inventory Number :   6929     
 Start Time : 31 Mar 1980 1422 GMT                  Latitude  :  50deg 55.1min N
 End Time   : 28 Apr 1980 0852 GMT                  Longitude : 004deg 59.9min W
 Nominal Cycle Interval   :  900.0 secs         Sensor Depth    :     59.00m    
                                                Sea Floor Depth :     59.00m    
 Positional Uncertainty   : 0.1 to 0.5 n.miles                                  
 Depth Datum              : Instantaneous                                       
 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  : 802/980/091                                         
 Additional information stored with the data:                                   
    Station BC4, Bristol Channel.                                               
    Clock gained 8 seconds over 35 days 20 hours; the cycle interval  and  time 
    values have been corrected.                                                 
    Instrument characteristics and calibration factors                          
           Teleost Pressure Recorder, sensor S/G, serial number 284             
           Original sampling interval          15 minutes                       
           Integration period                        900s                       
           Temperature coefficient           -1.78Hz/degC                       
           Pressure sensitivity at 9.867degC  0.0775Hz/mb                       
           To convert pressure to elevation the following                       
           values should be used:                                               
           Density (from CTD casts)             1027kg/m3                       
           Gravitational acceleration constant  9.811m/s2                       
    Density calculated from measured temperatures and a regional salinity of 35 
    parts per thousand.                                                         
 The following additional documents apply to this series:                       
  27731; I.O.S. Calibration and Data Processing of Off-Shore Tide Gauge Data    
  27840; Teleost Pressure Recorder