Capt. Jahmar F. Resilard, 28, was pronounced dead after he was found during search and rescue operations off Kochi on Dec. 6.
Article 32 hearings were originally set for Dec. 10. The Navy did not say why the hearings were pushed to 2019.
The KC-130T transport aircraft crashed last year, killing 15 Marines and a Navy corpsman.
Five are still missing after a KC-130 Hercules and F/A-18 Hornet collided during routine refueling training off Japan.
The Oklahoma's casualties were second only to the USS Arizona, which lost 1,177 men.
A Marine refueling plane and a fighter jet crashed into the Pacific Ocean off Japan's southwestern coast after colliding.
Search-and-rescue operations are underway after an F/A-18 Hornet and KC-130 refueling tanker both crashed early Thursday.
The Marine Corps has punished two aviators who flew their aircraft deliberately to draw a giant penis.
Retired Marine 1st Sgt. John J. Lord was awarded the Navy Cross, the nation's second highest award for combat bravery
Gunnery Sgt. Efrain Martinez Jr., 34, of Marine Aerial Refueler Transport Squadron 152, died in his home on base Nov. 26.