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Grade 1- Easy
Small infrequent rapids with easily defineable course; small regular waves;
no problem of navigation through rapids of other obstructions.
Grade 2 - Moderately Difficult
Frequent rapids with regular waves, bends and eddies; stretches of easy
water between rapids; light to moderately difficult stoppers.
Grade 3 - Difficult
Passage through rapids requires manoeuvres to keep to the main course
and to avoid whirlpools, strong eddies and waves, small falls and holes;
passage not always easily seen from the river; only short passages of
light water between rapids; holding stoppers.
Grade 4 - Very Difficult
Long stretches of heavy rapids with irregular waves, lager falls, strong
current, powerful whirlpools, sharp curves and strong eddies. The way
through rapids is no easily recognised through the water, an will often
require inspection from the bank; difficult holding stoppers.
Grade 5 - Extremely Difficult
Long, extremely difficult rapids with large, irregular, and conflicting
wave patterns, extremely difficult falls, whirlpools, curves and eddies
requiring precision paddling to keep to the correct course; the route
through will not normally be recognisable from above and inspection of
each rapid, or section of rapids, will be required; extremely powerful
currents with a steep gradient; powerful and dangerous holding stoppers.
Grade 6 - Extremely Difficult with Strong Risk to Life and Limb
Not normally attempted, except by the most accomplished and experienced
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