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      • Section 1 (Rule 4 -10)
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      • Section 3 (Rule 19)
        • Rule 19 – Conduct of vessels in restricted visibility
    • Part C- Lights and Shapes
      • Rule 20 – Application
      • Rule 21- Definitions
      • Rule 22 – Visibility of lights
      • Rule 23 – Power-driven vessels underway
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      • Rule 25 – Sailing vessels underway and vessels under oars
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    • Part D- Sound and Light Signals
      • Rule 32 – Definitions
      • Rule 33 – Equipment for sound signals
      • Rule 34 – Manoeuvring and warning signals
      • Rule 35 – Sound signals in restricted visibility
      • Rule 36 : Signals to attract attention
      • Rule 37 – Distress signals
    • Part E- Exemptions (Rule 38)
      • Rule 38 – Exemptions
    • Part F – Verification of compliance with the provisions of the Convention
      • Rule 39 – Definitions
      • Rule 40 – Application
      • Rule 41 – Verification of compliance
    • Annexes
      • Annex 1 – Positioning and technical details of lights and shapes
      • ANNEX II – Additional Signals for Fishing Vessels Fishing in Close Proximity
      • ANNEX III – Technical Details of Sound Signal Appliances
      • ANNEX IV – Distress Signals
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Frontal Depressions – Types of Fronts, Weather Associated and Frontolysis

Weather-Fronts

Air Masses It is defined as a quantity of air with dimensions of about 500nm  or so, with little or no horizontal variation of any of its properties, especially temperature. Air masses are named after the sources from which they originate. Main air masses on the Earth are Tropical Air Masses and Polar Air Masses. Changes in the weather are caused by the movement of air masses. Factors affecting the properties of an Air-MassSource region - if the air mass is of Polar origin, it will be cold and if of tropical origin, it will be warm. Its track over the Earth's surface - if it passes … [Read more...]

By Cult of Sea Filed Under: Meteorology Tagged With: air mass, air masses, cold front, front, frontal, frontal depression, frontogenesis, frontolysis, occlusions, warm front

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