Rapids with high, irregular waves often capable of swamping an open canoe. Narrow passages that often require complex manoeuvring. May require scouting from shore.

• 三级急流中有不规则的大浪，通常能够打翻开放式划艇。有一些狭窄的通道，但要求复杂的技巧。可能需要上岸查看。