Helium Valve - a spring loaded plate valve used to allow helium to be vented to reduce internal gas pressure and to prevent damage to the envelope. 

Hydrogen - a flammable, colorless, oderless gas. Hydrogen is not used in modern airships because of the inherent danger of explosion or fire. The lightest element. Atomic number 1. 

Mast Head - a rotating locking device used to secure the airship to the mooring mast when the airship is not in flight. 

Montgolfier Balloon - built by Joseph and Etienne Montgolfier, was made of cloth and paper. The first living creatures to fly under a Montgolfier hot air balloon were a sheep, a duck, and a rooster. The balloon was launched in Versailles on September 19, 1783 before the French Royal Family, the court and 130,000 spectators. The first manned flight of a Montgolfier hot-air balloon was in Paris on November 21, 1783. Pilatre de Rozier and Francois Laurent (the Marquis d'Arlandes) flew across Paris for 25 minutes and traveled just over five miles. 

Mooring Mast - a structure designed to anchor the airship when it is not in flight. A mooring mast allows the airship to rotate on a horizontal plane, according to wind direction. 

Nose Cone - a structure attached to the front center of the airship envelope. In addition to its use with the airship battens to reduce envelope deformity in flight, the nose cone locks to the mast head to secure the airship when it is moored. 

Rip Panel - a stitched panel located in the upper front section of the airship envelope. In an emergency, the rip panel can be used to quickly deflate the airship.