- guardian.co.uk, Saturday 20 July 2013 21.20 EDT
The two AV-8B Harrier jets, launched from the aircraft carrier USS Bonhomme Richard, each jettisoned an inert practice bomb and an unarmed laser-guided explosive bomb into the World Heritage-listed marine park off the coast of Queensland state on Tuesday, the US 7th Fleet said in a statement on Saturday. The four bombs, weighing a total 1.8 metric tons (4,000 pounds), were dropped into more than 50 meters (164ft) of water, away from coral, to minimize possible damage to the reef, the statement said. None exploded.
The jets, from the 31st Marine Expeditionary Unit, had intended to drop the ordnances on the Townshend Island bombing range, but aborted the mission when controllers reported the area was not clear of hazards. The pilots conducted the emergency jettison because they were low on fuel and could not land with their bomb load, the Navy said.
The emergency happened on the second day of the biennial joint training exercise Talisman Saber, which brings together 28,000 US and Australian military personnel over three weeks. The US Navy and Marine Corps were working with Australian authorities to investigate the incident, the Navy said.
A 7th Fleet spokesman did not immediately respond on Sunday, when asked by email whether the dumping posed any environmental risk.