Well suited for SAR teams and fire service teams alike.Ī concern and something to remember is the pulleys at the AHD are part of the overall tensioning system, so caution needs to be placed with tensioning the trackline to much.6th Edition by Jim Frank and John McKently.Only two ropes are needed… granted, they need to accomplish the length of the angled drop (2x the length plus another 15 meters minimum).Hidden ContentĪdvantages to a skate block as the working line (as opposed to a hybrid system) are a few folds: The skate-block shown here a classic setup where the twin tracklines (TTRS) begin at the base where the tensioning/lowering systems are deployed and run up through change of direction pulleys and back down to the patient… there by completing the circuit and becoming “the skate block”. The monopod/gin-pole was guyed appropriately with a quad-guy pattern and the AHD was errored forward appropriately (following the guy plane and applied force angles). Our AHD (here a monopod/gin-pole) was placed at the top of the cliff in order to gain the necessary height to get past the edge and away from cliff face. In a trackline skate block system, the working line is the trackline in that the raise and or lowering system are all applied to the same system.
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