VMGR - 252 Marine Aerial Refueler Transport Squadron 252 ( VMGR - 252 ) is a United States Marine Corps KC - 130J squadron . They are a part of Marine Aircraft Group 14 ( MAG - 14 ) , 2nd Marine Aircraft Wing ( 2nd MAW ) and provide both fixed - wing and rotary - wing aerial refueling capabilities to support Fleet Marine Force air operations in addition to assault air transport of personnel , equipment , and supplies . The squadron , known as " Otis " is stationed at Marine Corps Air Station Cherry Point , North Carolina . It also has the distinction of being the oldest continually active squadron in the Marine Corps . Mission . Provide assault transport of personnel , equipment , and supplies , and to provide aerial refueling service to fixed and rotary wing aircraft . History . The Early years . The squadron was formed June 1 , 1928 , and designated Headquarters Detachment 7M in San Diego , California . The squadron was re - designated several times in the next decade . It received the designation Marine Utility Squadron 252 ( VMJ - 252 ) on July 1 , 1941 , and Marine Transport Squadron 252 ( VMR - 252 ) on April 1 , 1945 . World War II . The squadron was heavily involved during World War II and participated in the following campaigns : Pearl Harbor , Marianas , Iwo Jima , and Okinawa . Following the war , the squadron relocated to MCAS Cherry Point and was reassigned to Marine Aircraft Group 21 . Post World War II through the 1980s . In July 1946 , VMR - 252 was based at MCAS Miramar as part of Marine Aircraft Group 25 . They remained there until October 14 , 1946 when they were moved to MCAS El Toro . During October 1961 , the KC - 130 Hercules became the squadron ' s aircraft . With the introduction of the KC - 130 , the squadron ' s primary mission was changed to aerial refueling . On February 1 , 1962 , the Squadron received its present designation as Marine Aerial Refueler Transport Squadron 252 ( VMGR - 252 ) . In December 1965 , the KC - 130 was used to refuel the CH - 3 helicopter . This was the first time that a tanker drogue system was used to refuel a helicopter . The late sixties and early seventies found VMGR - 252 actively supporting U . S . Forces in the Republic of Vietnam , transporting essential equipment , parts , and personnel . VMGR - 252 also supported the introduction of the AV - 8A Harrier . In August 1973 , VMGR - 252 was involved in the development of safe and standardized aerial refueling procedures to be used with the Harrier . The Gulf War & the 1990s . In December 1988 , VMGR - 252 achieved another milestone in when it surpassed 300 , 000 accident free flight hours and won the distinction of achieving the most accident - free flight hours of any squadron in the Marine Corps and Navy . The decade of the nineties started in earnest with VMGR - 252 deploying aircraft to Freetown , Sierra Leone in support of 22nd Marine Expeditionary Unit operations following civil unrest in nearby Liberia . In addition , the first night - vision - goggle landing in a Marine Corps KC - 130 was accomplished in May 1990 . With little down time the squadron found itself facing an even greater challenge with the mobilization of forces for Operation Desert Shield . Six squadron aircraft were deployed to form VMGR - 252 Detachment Alpha . When Operation Desert Storm commenced on January 16 , 1991 , the detachment transitioned to combat operations and provided over 10 million pounds of fuel to strike aircraft during the course of 937 combat sorties . During the remainder of the 1990s , the squadron continued to support East Coast Marine Expeditionary Unit ' s for operations in Kenya , Rwanda , the Republic of the Congo , Albania , Liberia , Sierra Leone , and Kosovo . They also continued support for taskings Operation Northern Watch and Operation Southern Watch . The Global War on Terror . After the attacks on September 11 , 2001 , VMGR - 252 formed the backbone of logistical and assault support operations during Operation Enduring Freedom in Afghanistan and provided similar support for the 26th Marine Expeditionary Unit in Iraq during Operation Iraqi Freedom in the spring of 2003 . Approximately 30 % of the squadron has been continuously deployed in support of Operation Iraqi Freedom since 2003 . December 2002 marked a milestone in the history of VMGR - 252 with the acceptance of three KC - 130 J - model aircraft .