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sailed4seas talk five3
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sailed4seas talk five

1. collision risk = two veesels course line crossed each other.
2. the crossed point of two vessels is collision point.
3. speed vector is a good indiction 0f where

sailed4seas talk five https://youtu.be/zaHFL03xZs8

1. collision risk = two veesels course line crossed each other.
2. the crossed point of two vessels is collision point.
3. speed vector is a good indiction 0f where the collision will happen.
4. use three minutes speed vector to evaluate collision risk which is own ship 's maneuvering space.
5. shorten 3 minutes collision line is reduction of collision risk.
6. increase collision line is increase collision risk from never to must-be.

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