Eyes view of the river series

First class waters

Slow and clear water currents and some short jets. Water waves less than 30 cm. Very rare river stones. Most of them are wide, small gravel river beds. There is almost no drop. Self-help is also easy. Far ~

Secondary waters

The slight rush of the stream 'The riverbed is narrow and there is a height of one metre or less of river stone' when there is a stream of rushing towards the river' Occasionally, there will be rocks on both sides of the river. 'Similar riverbeds' Waves below 50 cm. 'There is some drop. And small rewinding flow, but very few drops appear~

Tertiary waters

Some streams of a waterfall and a waterfall are 'nearly a cliff' on both sides of the river. They are a narrower U-shaped river bed. There are a number of reversing flows that overwhelm the canoes in the next flight. Some irregular streams require technical caution. Select the channel 'The size of the river's stone is below two meters' and the waterfall below 2M appears' The river bed is within 100 meters from the height of the road. The height of the rewinding flow is less than 80 cm. One person ensures that everyone can sail.

Class IV waters

The distance between the two sides of the road is quite a few hundred meters or more. Some riverbeds are V-shaped canyons. The height of waterfalls is less than 4M. Many of the topography of a pond and a waterfall sometimes need to be carried by a boat while the size of a river stone is below 4M. 'The height of the rewinding flow is less than one metre. Each juncture level needs to disembark from the water to observe the water condition before it can sail down the default route' but the ability to manoeuvre the vessel needs to be quite accurate.

Grade 5 waters

There are highways to reach the starting point: 'There are no highways on the two banks to cut back and retreat'. The waterfalls are less than 6 meters in height. The 'falling stream under the waterfall will attract people' boats and all are V-shaped canyons. They are almost straight.' The height of the river stone is below 6M. 'The need to observe the appearance of the water hole. The careful flight' rescue is also very difficult. 'Only one person can sail.' Many people ensure their safety.

Level 6 Waters

The waters of the mountains in the exploration area “the starting point has no roads to reach” and “the number of days required to sail from the ship to the sailing point” is more difficult to control. “No retreating routes” and “unpredictable and unpredictable deep mountain streams” will meet and continue. All kinds of difficult conditions to come 'will have the psychological preparation of abandon ship at any time~