INFORMATION FOR BODC SERIES REF. NO.    37725                  
                         Sea Floor Pressure Gauge Inventory Number :   7009     
 Start Time : 21 Jul 1970 1052 GMT                  Latitude  :  56deg 55.1min N
 End Time   : 19 Aug 1970 1036 GMT                  Longitude : 008deg 35.2min W
 Nominal Cycle Interval   :  900.0 secs         Sensor Depth    :    137.00m    
                                                Sea Floor Depth :    137.00m    
 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  : POS13JUL70                                          
 Additional information stored with the data:                                   
    I.O.S. Data Processing of Off-Shore Pressure Recorder Data  2               
    1. Because the pressure is integrated over 890 seconds and then logged, the 
       time  value  assigned  to  a data cycle has been chosen as the mid-point 
       between the start and end of each integration period.                    
    2. Instrumental drift and depth have been removed, thus a drift free series 
       is produced with an artificial mean value.                               
    Clock gained 32 seconds over 29 days 11 hours 14 minutes  28  seconds;  the 
    cycle interval and time values have been corrected.                         
    Instrument Characteristics                                                  
    Station 13                                                                  
    OSTG Mk I no. 4                                                             
    Nominal sampling interval      900secs                                      
    Integration period             890secs                                      
    Actual sampling interval       14.99980mins                                 
 The following additional documents apply to this series:                       
  27728; Off-Shore Tide Gauge Type I