First of all, everyone should know how to judge the level of water flow.
The strength of the water flow is generally measured in "sections". This is a unit of speed. A saving equals 1.85 KM/H.
According to experience, any current exceeding 3 knots is a strong current. Diving in large areas, you should fully communicate with the diving boat, so that the shipkeeper pay full attention to follow, and everyone must carry the water signal equipment.
How to determine the size of the water flow:
1. When there is no water flow, all the small fishes in the coral area swim in all directions without regularity. Into a large group.
2, when the weak current (about 0.5-1 section); coral fish arranged in the direction of the water. If the water flow is less than 0.5 knots, the fish still flocks. If the fish population is low, close to the coral and dispersed, the current may reach 1 knot. You can use fins to swim in a section of water for a while.
3. Moderate flow (Section 1-2): The small fish in the coral area no longer swim in groups above the corals. Instead, they hide behind the corals to hide from the water and swiftly move the fins to withstand the current. At this time, the big fish may appear and swim against the water. If you let go of the fish, the fish will come on the way and you will have to use fins to make it difficult to run backwards.
4, strong currents (2-3); then you will be hard to see the small fish, because they are hiding in the coral, big fish are closer to the bottom. If you want to stop when you are releasing, it is very difficult to grab reefs without hands. At this moment, the best thing is TAKETHERIDE, DONOTSTOP.
5, very strong current (3 and above): At this time you do not need to use the fish to judge, if you have not been fast moving with a stream, or hide behind a coral or grab rocks or coral struggle. If you face the water you will feel that the mirror is about to blow and the breathing regulator starts FREE-FLOW.
In general, more than 3 knots of water are dangerous and should be avoided.
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