3.3 Display
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.64(67) - Adoption of New and Amended Performance Standards - (Adopted on 4 December 1996) - Annex 4 - Recommendation on Performance Standards for Radar Equipment. LR Note: See also MSC.192(79) - 3 Radar - 3.3 Display

3.3 Display

  3.3.1 The equipment should provide, without external magnification, a daylight display with a minimum effective diameter within the bearing scale of not less than:

  • .1 180 mm on ships of 150footnote gross tonnage and more but less than 1,000footnote gross tonnage;

  • .2 250 mm on ships of 1,000footnote gross tonnage and more but less than 10,000 gross tonnage, and

  • .3 340 mm on ships of 10,000 gross tonnage and upwards.

  3.3.2 The equipment should provide the following set of range scales of display. 0.25, 0.5, 0.75, 1.5, 3, 6, 12 and 24 nautical miles.

  3.3.3 Additional larger and smaller range scales may be provided

  3.3.4 The range scale displayed and the distance between range rings should be clearly indicated at all times.

  3.3.5 Within the effective display radar video area the display should only contain information which pertains to the use of the radar display for navigation or collision avoidance and which has to be displayed there because of its association with a target (e.g. target identifiers, vectors) or because of some other direct relationship with the radar display.

  3.3.6 The origin of the range scale (radar video) should start at own ship, be linear and should not be delayed.

  3.3.7 Multi-colour displays are permitted but the following requirements should be met:

  • .1 target echoes should be displayed by means of the same basic colours and the echo strength should not be displayed in different colours; and

  • .2 additional information may be shown in different colours.

  3.3.8 The radar picture and information should be readable under all ambient light conditions. If a light shield is necessary to facilitate operation of the display in high ambient light levels, then means should be provided for its ready attachment and removal.

  3.3.9 Selected parts of the System Electronic Navigation Chart (SENC) information may be displayed in such a way that the radar information is not masked, obscured or degraded. If SENC information is made available for a radar display it should at least include coastlines, own ship's safety contour, dangers to navigation and fixed and floating aids to navigation. The mariner should be able to select those parts of the SENC which can be made available and the mariner requires to be displayed.

  3.3.10 For the superimposition or selected parts of the SENC:

  • .1 Reference management

    Reference management is required to ensure that the information displayed is correlated and in the same reference and co-ordinate system;

  • .2 Display Area

    the whole effective display area should contain the available radar and SENC information;

  • .3 Matching and Adjustment

    in case of any deviations between the chart image and the radar image through detectable causes, manual adjustment should be possible. Any manual adjustment should be clearly indicated as long as it is activated. Resetting should be possible in a simple manner;

  • .4 Priority in the Display

    the display of radar information should have priority;

  • .5 Stability

    The equipment should be capable of appropriately stabilizing the radar image, ARPA vectors and SENC information. The operating mode should be clearly indicated; and

  • .6 Independence of Radar/ARPA and SENC

    • .6.1 the SENC information should not have an adverse effect on the radar picture;

    • .6.2 Radar/ARPA information and SENC information should be clearly recognizable as such; and

    • .6.3 in the case of a malfunction of one component, the function of the other component should not be affected.

  3.3.11 The frequency band in use should be indicated to the operator.

Parent topic: 3 Radar
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