RIVER CLASSES
CLASS I. EASY |
CLASS II. MODERATELY DIFFICULT |
Regular course, regular waves, small eddies. |
Irregular course, irregular waves, medium eddies, |
Simple obstacles. |
Simple obstacles in the current. |
CLASS III. DIFFICULT |
CLASS IV. VERY DIFFICULT |
High waves, large eddies, whirlpools and rapids. |
Continuous large waves, powerful and fast rollers. |
Boulders, small falls, various obstacles in the current. |
Rocks obstructing the current, higher falls with abseils. |
CLASS V. EXTREMELY DIFFICULT |
Class VI. LIMIT OF NAVIGABILITY |
Waves, whirlpools, extremely fast. |
Possibly navigable depending on water level. Great risks. |
Narrow passages, very high falls with difficult entries and exits. |
Notes:
This classification does not include the following categories of special routes:
– Dams which are easily crossed or very dangerous;
– Canals, small flat rivers, navigable rivers with slow to fast but regular currents, which present obstacles such as various dams, groins, buoys, low points, grazing enclosures, waves from wind or boats, whirlpools behind bridge piers;
– Calm stretches of water.