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Three-pipe Snow Fence System Snow Guards in Jackson, WY, USA Standing seam metal roof with Snow guards to keep snow from sliding off the roof too quickly. A snow guard is a device used to retain snow and ice from falling from one surface to a lower one; in contemporary usage, they are installed to prevent snow/ice pack from avalanching and damaging people, plants, and property below.
Low water advisory MWS – Critically below average water levels over the Great Lakes, coastal marine zones or other tidal marine area, waterway, or river inlet within or adjacent to a marine zone have been observed, and potentially present a hazard to maritime navigation.
Cold-weather warfare, also known as cold-region warfare, arctic warfare or winter warfare, encompasses military operations affected by snow, ice, thawing conditions, or cold, both on land and at sea, as well as the strategies and tactics used by military forces in these situations and environments.
Snow fences on Kitzsteinhorn Avalanche protection in Austria. A snow fence, similar to a sand fence, is a barrier that forces windblown, drifting snow to accumulate in a desired place. Snow fences are employed primarily to minimize the amount of snowdrift on roadways and railways.
United States Navy SEAL trainees with arms and legs tied during a drownproofing exercise.. In Drownproofing terminology, the great majority of people are "floaters". That is to say that, with the lungs fully inflated (or say at total lung capacity), they have slightly less specific gravity than water and will not start to sink until they exhale. [8]
Don Shipley joined the United States Navy in 1978 and became a Navy SEAL in 1984 [4] after graduating from Basic Underwater Demolition/SEAL training BUD/S class 131. [5] [better source needed] Following SEAL Basic Indoctrination (now known as SEAL Qualification Training or SQT) [6] and completion of a six-month probationary period, he received the NEC 5326 as a Combatant Swimmer (SEAL) and was ...