As home to supermajors, as well as a plethora of smaller, independent energy players, the US boasts one of the largest concentrations of energy personnel in the world. With its insatiable appetite for energy resources, the United States is the world's single largest consumer of oil, using as much as 20.73 million barrels per day as of 2008. Recently, interest has peaked in the vast quantity of untapped natural gas resources in the US, the reserves of which were inventoried in 2008 at 238 Tcf, with producers specifically targeting the nation's promising shale formations for this energy commodity.
A B Seaman refers to a qualified seaman a rank above Ordinary Seaman in the navy or military (although in a civilian occupation this may be an unlicensed crew member). An A B Seaman will work in the Deck department and report to the Chief Mate. This may also be referred to as "Able Seaman" or "Able-Bodied Seaman". The A B Seaman performs watch standing duties as well as general maintenance and upkeep of materials and equipment on board.