The C-130J Hercules is a military transport aircraft that can perform various missions, such as airlift, airdrop, air refueling, and maritime patrol. It is an upgraded version of the C-130 Hercules, with new engines, propellers, avionics, and other systems. The C-130J has been in service since 1999 and has been delivered to 26 operators in 22 countries. The C-130J-30 is a stretched variant of the C-130J, with a longer fuselage and increased cargo capacity. It is used by several air forces, including the Royal Air Force and the Royal Australian Air Force. The KC-130J is a tanker variant of the C-130J, capable of transferring fuel to other aircraft and carrying additional fuel tanks in the cargo bay. The SC-130J Sea Hercules is a proposed maritime patrol variant of the C-130J, equipped with a radar, weapons, and sensors for anti-submarine and anti-surface warfare. The LM-100J is a civil cargo variant of the C-130J, intended for commercial and humanitarian operations.