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Guidon (United States) - Significance. The significance of the guidon is that it represents the unit and its commanding officer. When the commander is in, his or her guidon is displayed for everyone to see. When he leaves for the day, the guidon is taken down.
The latter are intended for bank or cliff stabilisation and are not normally suitable for use in shoreline situations. Functions of gabions. The purpose of a gabion revetment is to provide short term (5-10 years) protection from backshore erosion by absorbing wave energy along the dune face.hey are filled insitu, often with locally available material and therefore have a relatively low capital cost. Because they are flexible and porous they can absorb some wave and wind energy, thereby reducing the scour problems associated with impermeable sea defences such as concrete seawalls.