INFORMATION FOR BODC SERIES REF. NO.    33724                  
                         Sea Floor Pressure Gauge Inventory Number :   6945     
 Start Time : 04 Jun 1973 1437 GMT                  Latitude  :  53deg 30.0min N
 End Time   : 17 Jul 1973 1422 GMT                  Longitude : 003deg 13.0min W
 Nominal Cycle Interval   :  900.0 secs         Sensor Depth    :      9.90m    
                                                Sea Floor Depth :      9.90m    
 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  : 733/973/155                                         
 Additional information stored with the data:                                   
    Station LB, Liverpool Bay.                                                  
    Clock lost 3 seconds over 57 days, 3.25 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 Mk II, logger 03, sensor VIB  1/1                               
           Original sampling interval          15 minutes                       
           Integration period                        900s                       
           Temperature coefficient             0.111Hz/cm                       
           Pressure sensitivity at 12.0degC    0.040Hz/cm                       
           To convert pressure to elevation the following                       
           values should be used:                                               
           Density                           1032.10kg/m3                       
           Gravitational acceleration constant  9.814m/s2                       
    No CTD casts were taken; the density value given  is  the  average  density 
    recorded  at Liverpool Bay Light Vessel 1935 - 1946.  The depths quoted are 
    relative to  Ordnance  Datum  Newlyn.The  depths  quoted  are  relative  to 
    Ordnance Datum Newlyn.                                                      
 The following additional documents apply to this series:                       
  27731; I.O.S. Calibration and Data Processing of Off-Shore Tide Gauge Data    
  27762; Off-Shore Tide Gauge Mark II