90-day Monitoring Report - National Marine Fisheries Service - NOAA

UME04085
R.V Marcus G. Langseth
L-DEO/NMFS
05 January 2012
LIST OF FIGURES
Figure 1. Location of the Coakley marine geophysical survey in the Arctic Ocean (LGL EA, 2011).
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Figure 2. The R/V Marcus G. Langseth showing location of bridge (12.8m asl) and MMO tower
(18.9m asl), where observations were conducted. .......................................................... 6
Figure 3. Location of the hydrophone deployment. ...............................................................10
Figure 4. Breakdown of acoustic source operations. .............................................................13
Figure 5. Duration of visual and acoustic monitoring effort while the acoustic source was active
vs. silent. ...................................................................................................................15
Figure 6. Total visual effort from observation locations on board the R/V Langseth. ................16
Figure 7. Total PAM and visual monitoring effort. .................................................................17
Figure 8. Visibility during visual monitoring over the Coakley marine geophysical survey. ........17
Figure 9. Wind force each week visual monitoring was conducted. ........................................18
Figure 10. Duration of snow and fog while visual monitoring was conducted. .........................19
Figure 11. Number of protected species detections each day of the Coakley marine geophysical
survey. ......................................................................................................................21
Figure 12. Number of individual animals observed. ..............................................................22
Figure 13. Cetacean spatial distribution of detections during the Coakley two-dimensional (2D)
marine geophysical survey. .........................................................................................23
Figure 14. Pinniped spatial distribution of detections during the Coakley two-dimensional (2D)
marine geophysical survey. .........................................................................................24
Figure 15. Number of power down procedures implemented for observed protected species. ..26
Figure 16. Percentage of overall downtime attributed to each protected species group. ..........27
Figure D.17: Diagram of Linear Hydrophone Array ...............................................................46
Figure D.18: PAM Laptops and data processing unit setup ....................................................47
Figure D.19: Hydrophone cable on winch ............................................................................47
Figure D.20: Hydrophone cable secured by a yale grip to the port sponson ............................48
Figure D.21: Rope drogue and first chain weight secured near hydrophone elements. ............48
Figure D.22: One of the four lengths of chain used to weigh down the cable..........................49
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