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Maritime Knowledge base

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    • Bridge Equipment
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    • Ship Handling
    • Ship Stability
    • Shippie’s Escape
    • Surveys
    • Tankers
  • Colreg’s (ROR)
    • Index (Colreg’s)
    • Part A- General
      • Rule 1 – Application
      • Rule 2 – Responsibility
      • Rule 3 – General Definitions
    • Part B- Steering and Sailing
      • Section 1 (Rule 4 -10)
        • Rule 4 – Application
        • Rule 5 – Lookout
        • Rule 6 – Safe Speed
        • Rule 7 – Risk of collision
        • Rule 8 – Action to avoid collision
        • Rule 9 – Narrow Channels
        • Rule 10 – Traffic separation schemes
      • Section 2 (Rule 11 – 18)
        • Rule 11 – Application
        • Rule 12 – Sailing vessels
        • Rule13 – Overtaking
        • Rule 14 – Head on situation
        • Rule 15 – Crossing situation
        • Rule 16 – Action by give-way vessel
        • Rule 17 – Action by stand-on vessel
        • Rule 18 – Responsibilities between vessels
      • 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
      • Rule 24 – Towing and pushing
      • Rule 25 – Sailing vessels underway and vessels under oars
      • Rule 26 – Fishing vessels
      • Rule 27 – Vessels N.U.C or R.A.M
      • Rule 28 – Vessels constrained by their draught
      • Rule 29 – Pilot vessels
      • Rule 30 – Anchored vessels and vessels aground
      • Rule 31 – Seaplanes
    • 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
  • Glossary
  • Contact

Overtaking

Said of a vessel when she is passing or overtaking another vessel.Must Read: Rule 13: Overtaking … [Read more...]

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Overdue

A situation where a craft has failed to arrive at its intended destination when expected and remains missing. … [Read more...]

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Outboard

Towards the sides of the vessel (with reference to the centerline). … [Read more...]

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Ordinary seaman (OS)

The beginning grade for members of the deck department. The next step is able bodied seaman. … [Read more...]

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On Board Quantity

The material remaining in vessel tanks, void spaces, and/or pipelines prior to loading. Onboard quantity includes water, oil, slops, oil residue, oil/water emulsions, sludge, and sediment. … [Read more...]

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Officer of the watch (OOW)

The officer in charge of the watch. … [Read more...]

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OCIMF

The oil companies’ international marine forum is an organization of oil companies that own or operate ships. … [Read more...]

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oceanic gyre

A very large, more or less circular, pattern of water circulation in an open ocean basin. … [Read more...]

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Ocean Region

The coverage area of an Inmarsat satellite within which an SES may send and receive messages. … [Read more...]

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Oil tanker

a ship constructed or adapted primarily to carry oil in bulk in its cargo spaces and includes combination carriers and any ‘chemical tanker’ as defined by Annex II of MARPOL, when it is carrying a cargo or part cargo of oil in bulk.  … [Read more...]

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