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route card
A route card is a document that is used by hillwalkers as an aid to navigation and route planning. The military also use a similar technique for planning night marches and/or patrols.
== Core information: The planned route ==
The planned route is broken down into discrete sections termed "legs" or "stages". Whenever possible, each leg will start and finish at a clearly defined topographical feature such as a lake, knoll, saddle, stream junction and so on. In most cases the legs are defined as being the longest section that might be safely followed on a single compass bearing. The object is to split the overall route into sections that can be readily undertaken in conditions of poor visibility such as in cloud, fog or at night.
In addition to the compass bearing, for each leg the total distance will be measured as well as the height gained or lost and the steepness of the ground. Using this information an estimated time to complete the leg will be calculated usually using Naismith's Rule or one of its variations. These times are then added to estimate the total time needed for the expedition.
For each leg note may also be taken of potential sources of danger along the route such as cliffs or of handrail/collecting features to aid in confirming the route.
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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