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Division 4.7 Ranges/Range rings

United Kingdom

Original text. Later amendments are not shown.

  1. (a)

    In navigation mode the following fixed ranges and range rings are prescribed according to the radar regulations:

    RangeRange rings
    500 m100 m
    800 m200 m
    1 200 m200 m
    1 600 m400 m
    2 000 m400 m
    4 000 m800 m
  2. (b)

    Smaller and larger ranges with a minimum of four and a maximum of six range rings are permitted.

  3. (c)

    Inland ECDIS equipment in navigation mode shall have fixed range rings with the intervals set out in points (a) and (b) and at least one variable range marker (VRM).

  4. (d)

    Switching on/off of fixed and variable range markers shall be independent of each other and their display shall be clearly distinguishable.

  5. (e)

    The position of the VRM and the corresponding displayed distance shall use the same increments and resolution.

  6. (f)

    The functions of the VRM and the electronic bearing line (EBL) may additionally be realised by a cursor and by a corresponding numerical display, showing range and bearing of the cursor position.