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Buys Ballot Law and avoiding the center of a low.wmv



US Captains Training

How to avoid the center of a low presure system with buys ballot law.

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26 thoughts on “Buys Ballot Law and avoiding the center of a low.wmv
  1. It’s wrong
    Right is in N hemisphere , observer stand with his back to wind low pressure is his left and high pressure is his right and north hemisphere its wind blows anti-clockwise

  2. i think he has this backwards since in the northern hemisphere cyclones typically have a west/northwesterly track. The veering should be to the left of the track and backing should be on the right as it is coming at you, making the south side of the example the navigable side and your center of the low should be somewhere between 100-135 degrees relative to the direction the wind is coming from.

  3. Sorry Wrong definition : In the Northern Hemisphere, if a person stands with his back to the wind, the atmospheric pressure is low to the left, high to the right. This is because wind travels counterclockwise around low pressure zones in the Northern Hemisphere.

  4. Hi
    1.arrow showing outward…should be inward.
    2. You are showings a anti clock wise direction. That means northern hemisphere right so navigable semi circle should be left or down. But you are showing top ?

  5. Very good method of remembering. Thanks. Although, 'dangerous' depends very much on your vessel's stability. For example, an offshore/platform supply vessel (or other fine lined hullform) may become unstable (parametric rolling/free to trim KN problem) due to partial loss of buoyancy with a following sea. Hence, backing weather, heading cross atlantic, should be avoided. Better to be head on to weather in some cases.

  6. Tropical revolving storms usually:
    A. do not form within 5 degrees of the Equator.
    B. move in a westerly direction before re-curving towards the Equator.
    C. form close to one side of the Equator and, while moving slowly in a westerly direction, cross over to the other hemisphere.
    D. move in an easterly direction before re-curving towards the nearest pole.

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