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Table T15. Source parameters for walkaway vertical seismic profile.

Feature Specification
Navigation system SPECTRA (Concept Inc.)
Gun controller Digishot Ver3.1 (ION Inc.)
Air gun Annular Port Air Gun (BOLT Technology)
Gun configuration 1950 in3 × 4 strings (Fig. F21)
Total volume (in3) 7800
Gun pressure (psi) 2000
Gun depth (m) 8
Kairei ship speed (kt) 4 (against ground) recommended; <5 against ground or water required
Shooting interval for Line 1 (m) 60
Shooting interval for circle shooting (s) 30

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