ACQUISITION REPORT Sequence-0031
 Survey:  
  Client Bass Strait Oil Company
  Area Vic/P42 Gippsland Basin
  Vessel GECO_BETA
  JobNumber 9226
  Survey Type 8 STREAMER DUAL SOURCE
   
 Sequence  
  Linename VP421184B031
  Preplot VP421184
  Direction 13.0°
  SOL Date 22:31:13utc 03-Aug-2002
  EOL Date 23:17:22utc 03-Aug-2002
 Attributes:  
   Wind Force 25.0 [knots] Dir SW
   Swell Height 1.5 [meters] Dir SW
   Propellor rpm 136 [avg]  
   Propellor pitch 90 [avg]  
       
  SOL EOL  
   Waterdepth 67.0 67.0 [meters]
   Bottomspeed  4.3 4.6 [knots]
   Featherangle sb +8.6 sb +5.1 [deg]
   Cable noise 15.2 10.6 [µBar rms]
   Lowcut filter 3 3 [hz]
   Filter slope 18 18 [dB]
   Filter Slope 18 18  
   Port Volume 3542.0 3542.0  
   Stbd Volume 3542.0 3542.0  

Source Configuration
Source Position Inline Crossline Nominal Nom. Vol. Subarray Gun
Number   Offset [m] Offset [m] Depth [m] [inch ³] Count Count
1 STBD -345.0 25.0 -7.0 3542.0 3 24
2 PORT -345.0 -25.0 -7.0 3542.0 3 24

Streamer Configuration
Streamer Position Inline Crossline Nominal Length Type Group Channel Front-Tail
Number   Offset [m] Offset [m] Depth [m] [m]   Interval [m] Count  
1 STBD -520.0 350.0 -8.0 4600 Nessie-3 12.5 368 0001-0368
2 STBD -520.0 250.0 -8.0 4600 Nessie-3 12.5 368 0369-0736
3 STBD -520.0 150.0 -8.0 4600 Nessie-3 12.5 368 0737-1104
4 STBD -520.0 50.0 -8.0 4600 Nessie-3 12.5 368 1105-1472
5 PORT -520.0 -50.0 -8.0 4600 Nessie-3 12.5 368 1473-1840
6 PORT -520.0 -150.0 -8.0 4600 Nessie-3 12.5 368 1841-2208
7 PORT -520.0 -250.0 -8.0 4600 Nessie-3 12.5 368 2209-2576
8 PORT -520.0 -350.0 -8.0 4600 Nessie-3 12.5 368 2577-2944

Recording Configuration
Channel Descr. Recording Data RecLen Sample Chan Chan # Chan Chan # Filter
Set   Format Reduction [ss ¹] Int. [ms] In In Out Out Delay [ms]
1 NFH SEGD 8015, Rev.2 NONE 6.0 0.25 0036 0001-0036 0036 0001 - 0036 0.00
2 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0001-0368 0368 0001 - 0368 5.60
3 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0369-0736 0368 0369 - 0736 5.60
4 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 0737-1104 0368 0737 - 1104 5.60
5 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1105-1472 0368 1105 - 1472 5.60
6 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1473-1840 0368 1473 - 1840 5.60
7 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 1841-2208 0368 1841 - 2208 5.60
8 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 2209-2576 0368 2209 - 2576 5.60
9 SEIS SEGD 8015, Rev.2 NONE 6.0 2.0 0368 2577-2944 0368 2577 - 2944 5.60

Production
  Shotpoint File Time [utc]
   SOL Noise Record(s)   2522 - 2521  
   SOL Dummy Record(s) 2520 - 2511 2520 - 2511 22:29:47 - 22:31:04
   FSP Start of Line 2510 2510 22:31:13
   MSP      
   LSP End of Line 2171 2171 23:17:22
   EOL Dummy Record(s)      
   EOL Noise Record(s)   2170 - 2170  
 Line-segments:
    SPs Files Times [utc] Type # CMPs Status Remarks
    2510 - 2501 2510 - 2501 22:31:13-22:32:30 Reshoot 16 Valid Overlap sp's
    2500 - 2181 2500 - 2181 22:32:38-23:16:03 Reshoot 16 Valid Reshoot seq 009 & 010 d/t whale sightings
    2180 - 2171 2180 - 2171 23:16:11-23:17:22 Reshoot 16 Valid Overlap sp's
 Remarks:      
   Navigation Streamer depth 8.0 mtr    
   Recording QC Frontsheet Set 1. Gundepth calibrated at atmospheric pressure 1032mB, pressure now 1019mB. High noise value, bend in cables @ SOL d/t short run-in.    

Tape-list
Stream 1
   Shot(s) Files Deck Reel Remark
  2522 - 2171 2522 - 2171 2 128  
Stream 2
   Shot(s) Files Deck Reel Remark
  2522 - 2171 2522 - 2171 3 128  

Seismic Data Annotations

NTBP
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL-2171 109 Killed traces  
ALL     ALL 161, 304 Noisy Channels  
ALL     ALL 2497, 1492 Weak Channels  
2184     2184 ALL External header lost  
Warning
Shot(s)     File(s) Trace(s) Type Remark
ALL     ALL ALL Swell Noise Swell noise seen on all cables approx 10%
ALL     ALL 1-13, 15-17, 22, 369-381, 737-738, 741, 745, 1841-1855, 1857, 1861, 2209-2228, 2230-2232, 2577-2601, 2603, 2606 Slope alarm > 5% of total line
2506     2506 ALL Gun timing error Gun 5-3 error (ms) : 1.2
2266     2266 ALL Gun timing error Gun 5-4 error (ms) : 1.1
2203     2203 ALL Gun timing error Gun 2-3 error (ms) : -1.3
Comment
Shot(s)     File(s) Trace(s) Type Remark


 List of used abbreviations:
     SOL/EOL  Start/End of line. 
     FSP/LSP  First/Last shotpoint of the line. 
     FCSP/LCSP  First/Last chargeable shotpoint
     MSP  Midnight (last) shotpoint of the day
     FGSP/LGSP  First/Last Good Shotpoint
     FOSP/LOSP  First/Last Overlap Shotpoint
     FSP/LSP R/O  First/Last Shotpoint Runout
   
     Deg  Degrees: e[0,360]
     rev  Revolutions
     utc  Universal Time Coordinated
     SPs  Shotpoints
     CMPs  Common midpoints
     NTBP  Not to be processed
     SI  Seismic interference
TRILOGY INFORMATION MANAGER - ACQUISITION REPORT - GENERATED 09:41:41utc 04-Aug-2002