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Fast-roping
Fast-roping, also known as Fast Rope Insertion Extraction System (FRIES),〔(MCRP 3-11.4A Helicopter Rope Suspension Techniques (HRST) Operations )〕 is a technique for descending a thick rope. It is useful for deploying troops from a helicopter in places where the helicopter itself cannot touch down. Fast roping allows Marines to respond to crises as a quick reaction force, conduct missions requiring stealth and board vessels while at sea.〔(Fast roping prepares Marines for rapid ship-to-shore deployment )〕 First developed by the British with UK rope manufacturer Marlow Ropes, its first combat use was during the Falklands War. The original rope was a thick nylon that could be used in a manner akin to a firepole. The special ropes used today are braided (plaited), which results in a pattern on the outer circumference that is not smooth and so is easier to grip.〔(Fast Rope Inspection Manual )〕 Originally, each person would hold the rope for the next person; however this has been phased out.
It is quicker than abseiling (rappelling), although more dangerous,〔 particularly if the person is carrying a heavy load, because the rope is not attached to them with a descender. The person holds onto the rope with his gloved hands and feet and slides down it.
Several people can slide down the same rope simultaneously, provided that there is a gap of approximately between them, so that each one has time to get out of the way when they reach the ground.
==Rope==
The rope must be thick, typically diameter, to prevent it from being wildly jerked about from the rotor blast of the helicopter.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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