| CLASS
I |
Moving water a few
riffles and small waves. Few or no
obstructions. |
| CLASS
II |
Easy rapids with waves
up to three feet, and wide, clear
channels that are obvious without scouting. Some maneuvering is
required. |
| CLASS
III |
Rapids with high,
irregular waves often capable of swamping
an open canoe. Narrow passages that often require complex maneuvering.
May require scouting from shore. |
| CLASS
IV |
Long, difficult rapids,
with constricted passages that often
require precise maneuvering in very turbulent waters. Scouting from
shore is often necessary, and conditions make rescue difficult.
Generally not possible for open canoes. Boaters in covered canoes and
kayaks should be able to Eskimo roll. |
| CLASS
V |
Extremely difficult,
long and very violent rapids with highly
congested routes that nearly always must be scouted from shore. Rescue
conditions are difficult and there is significant hazard to life in
event of a mishap. Ability to Eskimo roll is essential for kayaks and
canoes. |
| CLASS
VI |
Difficulties of Class V
carried to the extreme of
navigability. Nearly impossible and very dangerous. For teams of
experts
only, after close study and with all precautions taken. |