Devices such as propane exploders (cannons), pyrotechnics, and bioacoustics are frequently deployed on airports. Chester Nimitz for permission to deactivate the magnetic exploders. Returning to the carrier and changing to conventional contact exploders, the second attack is successful. The magnetic influence exploders on these were disabled and the depth set at . In 1969 three M113A1s were modified in South Vietnam to dedicated mine exploders. Propane exploders are capable of creating noises of approximately 130 decibels (Wildlife Control Supplies). The faulty exploders from the T2 were scrapped in favor of a new design. "Patapsco" and Patuxent tested "electrical protective devices" to render mine exploders ineffective. Pearl Harbor made working exploders by using lighter weight aluminum parts. Initially the depth-keeping equipment and magnetic and contact exploders were notoriously unreliable. The Exploders are an alternative rock band from Lake Bolac, Victoria, Australia. Exploders were tested at the Newport lab and in a small field test aboard .