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Rigger Ref is a reference and calculation utility for riggers. Keep specifications of ropes, hardware, slings, and material densities at your finger tips. Quickly figure safe working loads, line sag, amount of line on a drum, and bridle calculations.Calculation features:-Figure Catenary curves based on line tension, weight, line weight, and tower heights. -Figure amount of Line on a Drum using Drum Calc-Estimate weights based on volume and materials using Load Calc-Figure sling tension, and angles for different bridles-US and Metric units / on the fly conversionReference Features:-Common Rope Specifications-Common Hardware Specifications-Common Sling Specifications-Search Specifications and Comments-Automatically figure Safe Working Loads-Quick Ruler for measuring Line widths on the home screenCustomization Features:-Add your own Ropes or Hardware-Set your own Safety Factors for figuring Safe Working Loads-Track which ropes and hardware you've got on hand. -Create manifests of frequently used equipment to automatically total weights or costs. -Track when a manifest or equipment exceeds or falls short of a weight budget.-Mail manifests of equipment or labor quickly. -Easily import manifests onto other devices running Rigger Ref. Ontomni Features:-Extensive Context Sensitive Help-Prompt Support