pressure-watertight
81Underwater videography — is the branch of underwater photography concerned with capturing underwater moving images either as a recreational diving or commercial documentary or movie making activity.Limitations of Underwater VideoThe primary difficulty in underwater… …
82Stryker — Infobox Weapon name=Stryker caption=M1126 Stryker ICV origin=flagcountry|United States type=Armored personnel carrier is vehicle=yes crew=2+9 length= 6.95 m (22.92 ft) width= 2.72 m (8.97 ft) height= 2.64 m (8.72 ft) weight= ICV: 16.47 t (18.12… …
83Charles Momsen — Charles Bowers Momsen Nickname Swede Born June 21, 1896 …
84Operation Commando Hunt — Part of the Vietnam War Targets: (top) loaded PAVN trucks, (mid) POL storage area, (bot) open supply storage area …
85Earthship — An Earthship refers to a passive solar home made of natural and recycled materials. Designed and marketed by Earthship Biotecture of Taos, NM, the homes are primarily constructed to work autonomous and are generally made of earth filled tires,… …
86Smokeless powder — is the name given to a number of propellants used in firearms and artillery which produce negligible smoke when fired, unlike the older gunpowder (black powder) which they replaced. The basis of the term smokeless is that the combustion products… …
87HMS Agincourt (1913) — For other ships of the same name, see HMS Agincourt. HMS Agincourt 1915 Career (Brazil) …
88Personal flotation device — A man wearing a life vest, with another life vest hanging at the lower left. A personal flotation device (abbreviated as PFD; also referred to as, lifejacket, life preserver, Mae West, life vest, life saver, cork jacket, buoyancy aid, flotation… …
89SMS Von der Tann — SMS stands for Seiner Majestät Schiff , or His Majesty s Ship in German.] was the first battlecruiser built for the German Kaiserliche Marine, as well as Germany s first major turbine powered warship. At the time of her construction, Von der Tann …
90Caisson (engineering) — In geotechnical engineering, a caisson is a retaining, watertight structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the… …
