Covering Sheet

Survey details

Data fieldInstructions
Survey nameEnter job name given to the survey by the proponent/client
Proponent company nameEnter name of party responsible for planning the seismic survey
Seismic company nameEnter name of company contracted by the client to carry out the survey
Ship owner’s nameEnter name of company that owns the source vessel
Seismic source vesselEnter name of source vessel
Ship total length (m)Enter total overall length of source vessel in metres, Typically around 50–120 m
Number of Observers per swingEnter number of observers per rotation, will usually be 4
First–third MMO & PAM observerEnter observers’ surnames. There will most likely be names to enter in first & second for each discipline. If there are more observes on-board than there are cells (e.g. trainees), these names can be entered in the report. The names not included here can be entered manually in the sightings forms they are involved in
Observer providerEnter the name of the company(ies) that supply the MMO & PAM Operators
Survey start & end dateEnter date in day/month/year format. These are the dates the source vessel left the harbour boundaries to conduct the survey and the date it returned. Leave the end date blank if unknown (e.g. observers got off the vessel before the survey was over)
Survey area in km2Enter survey area in km2
Exploration permit areaEnter reference code/number
Support vesselEnter name of support vessel
Additional source vesselChoose yes or no from dropdown menu
Compliance with Code?Choose yes or no from dropdown menu to indicate whether the vessel was compliant with the Code throughout the swing
Comments on ComplianceEnter details to expand on the above
Insert map of survey areaIn the large box paste in a copy of the operational area drawn on a chart
Survey levelChoose 1–3 from dropdown menu
Survey typeChoose 2D, 3D, 4D, VSP, or OBS from dropdown menu
Start & end date (swing)Enter the start and end date of the swing/rotation (i.e. when observers join or take over from departing observers and/or when the majority of the observers leave the source vessel and are replaced)
SwingSelect a number from 1–8 to indicate what swing, within the survey, is completing the particular workbook

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Position of ship (metres)

For each observation point enter in eye height, distance to source, stern, bow, and outer door. These will be used to calculate distances to the animal.

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Acoustic source array specifications

Enter in details manually according to information obtained from the source vessel seismic crew.

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Data fieldInstructions
Number of streamersStreamers are towed behind the vessel and contain the seismic receivers/hydrophones
Length of streamers (metres)Typically 5,000–6,000 m, and up to 12,000 m
Depth of streamers (metres)Typically 4–10 m
Turtle guards on tail buoys?Tail buoys are found at the end of the streamers
Number of array stringsThis is referring to the gun array’s sub-arrays
Source depth (metres)Typically 5–8 m
Operational capacity (cubic inches)Array capacity as set out in the MMIA
Maximum capacity (cubic inches)1,000–8,000 cubic inches
Smallest acoustic gun (cubic inches)e.g. 40 cubic inches
Shot point interval (metres)This is the distance between each firing of the airguns
Shot point interval (time, sec)This is the time elapsed between each firing of the airguns
Array operating systemWhat the seismic crew use as an on-board gun controller and hydrophone acquisition system
Operating pressure (psi)Typically 2,000–2,500 psi
Frequency range (Hz)Typically 10–200 Hz
Peak at source sound levels (dB re 1 µPa-m)Refers to the source level at 1 m

Typical values taken from IAGC’s ‘An overview of marine seismic operations’ (IAGC 2011).

PAM specifications

PAM specifications are entered manually by PAM Operators.

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Operational area co-ordinates

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References

IAGC (2011) An overview of marine seismic operations. p. 46. IAGC.