version of the aviator and NFO Insignia, known as the Naval Astronaut and Naval Astronaut (NFO), respectively. The Marine Aerial Navigator insignia is issued to enlisted personnel qualified to act as navigators aboard Marine aircraft; the Naval Aviation Observer insignia is issued to flight support personnel; and the Aircrew insignia and UAS Operator insignia are issued to enlisted personnel designated to operate equipment aboard aircraft. Parachutist Insignia The Parachutist Insignia, also known as "lead sleds" or "lead wings", is awarded to personnel upon successful completion of the Basic Airborne Course at the Army Airborne School. The silver Basic Parachutist Insignia is issued for completion of basic parachutist training, five qualifying jumps. The gold Navy and Marine Corps Parachutist Insignia (first authorized for Marines in 1963 and Navy Parachute Riggers in 1941) are issued after five additional qualifying jumps. Graduation of US Navy Parachute Rigger school is no longer mandatory to earn the device. Explosive Ordnance Disposal Insignia The Explosive Ordnance Disposal (EOD) Breast Insignia, also known as the "Crab", is awarded to personnel who have successfully completed training at the Naval School Explosive Ordnance Disposal (NAVSCOLEOD), Eglin Air Force Base, Florida. Personnel are trained to deal with the render-safe and disposal of conventional and unconventional munitions ranging from unserviceable small arms ammunition, improvised explosive devices (IEDs), to chemical/biological and nuclear munitions. Diver Insignia Diver Insignia are issued to personnel who are qualified divers and is given in several degrees. The first degree of diver insignia is SCUBA Diver. The remaining insignia are awarded for deep sea dive qualifications and are issued in the degrees of Second Class, First Class, Master Diver, and Diving Medical Technician for medical personnel who have qualified as both divers and medical response personnel to medical emergencies underwater. Combatant diver insignia is issued to graduates of the Combatant Diver Course, who are typically in the recon community. This badge features a Dräger LAR-V rebreather and low-profile diving mask. Marine Special Operator Insignia In August 2016, the Marine Corps approved a new Marine Special Operator Insignia for wear by graduates of the five-phase Individual Training Course (ITC). The pin device will first be issued to the next ITC graduating class of critical skills operators. Critical skills operators and special operations officers already in the field will receive their pins later. Marksmanship Badges Marine Corps marksmanship qualification badges are suspended beneath a bar reading the type of weapon