INFORMATION FOR BODC SERIES REF. NO.    33785                  
                         Sea Floor Pressure Gauge Inventory Number :   6974     
 Start Time : 02 Nov 1974 0000 GMT                  Latitude  :  59deg 46.9min N
 End Time   : 19 Nov 1974 0800 GMT                  Longitude : 000deg 00.5min W
 Nominal Cycle Interval   : 3600.0 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  : 744/974/306                                         
 Additional information stored with the data:                                   
    Station H, Northern North Sea                                               
    The tide gauge was trawled up some time after 1345h 19 Nov 1974  and  taken 
    by  a  Danish  fishing vessel to Hirtshals. No timing corrections have been 
    applied. Both thermistor channels failed after 10 days although many values 
    before  this  are  suspect.  No  current meters were deployed at this site, 
    therefore a constant temperature of 7.3degC was assumed.  An  interpolation 
    program  was  used  to  produce hourly values, on the hour, of the pressure 
    Instrument characteristics and calibration factors                          
           OSTG Type I logger 41, sensor FM 4882/32                             
           Original sampling interval          15 minutes                       
           Integration period                        890s                       
           Temperature coefficient           40.01Hz/degC                       
           Pressure sensitivity at 9.8degC     1.467Hz/cm                       
           To convert pressure to elevation the following                       
           values should be used:                                               
           Density (from CTD casts)         1027.385kg/m3                       
           Gravitational acceleration constant  9.819m/s2                       
 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