The MH-53E Sea Dragon is used primarily for Airborne Mine Countermeasures (AMCM), with secondary missions of vertical shipboard delivery and assault support.
The MH-53E was derived from the CH-53E Super Stallion and is heavier and has a greater fuel capacity than its ancestor. The MH-53 can operate from carriers and other warships and is capable of towing a variety of mine hunting/sweeping countermeasures systems, including the Mk 105 magnetic minesweeping sled, the AQS-14A side-scan sonar, and the Mk 103 mechanical minesweeping system. When performing the assault support mission, the MH-53E can be fitted with the GAU-21 .50-cal. machine gun ramp-mounted weapon system.
Source: The US Navy
The Sikorsky CH-53E Super Stallion is the largest and heaviest helicopter in the United States military. It was developed from the CH-53 Sea Stallion, mainly by adding a third engine. Sailors commonly refer to the Super Stallion as the “Hurricane Maker” because of the downwash the helicopter generates. It was built by Sikorsky Aircraft for the United States Marine Corps.