You gotta typo, wrote HC-130J shudda been MC-130J.
The MC-130J flies clandestine or low-visibility, low-level air refueling missions for special operations helicopters and tilt-rotor aircraft, and infiltration, exfiltration and resupply of special operations forces by airdrop or airland, including politically sensitive or hostile territories.
http://www.fi-aeroweb.com/Defense/MC-130J-Commando-II.html