bn:01767308n
Noun Named Entity
Categories: Paddling, Hazard scales, Rating systems, Whitewater sports, Canoeing and kayaking
EN
International Scale of River Difficulty  Class I river  Class II whitewater  IRSD  ISRD
EN
The international scale of river difficulty is an American system used to rate the difficulty of navigating a stretch of river, or a single rapid. Wikipedia
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EN
The international scale of river difficulty is an American system used to rate the difficulty of navigating a stretch of river, or a single rapid. Wikipedia