46. In the case of a surveying involving the use of an air gun as an energy source, the authorization holder must ensure
(1) that, during the surveying, the air vessels, air manifolds, air lines and electrical lines and the compressor of the air gun system are regularly inspected for signs of abrasion and wear; where the compressor, a vessel, a manifold, an air line or an electrical line is defective, it must be promptly replaced or repaired if possible;
(2) where there is air pressure in the air gun, the pressure is maintained as low as is practicable but sufficiently high to ensure that the air gun remains seated and that there is no danger of accidental firing; and
(3) that, where a firing is carried out from the deck of a vessel or of a platform, the person charged with the use and maintenance of the gun is present.