11 Route Planning, Monitoring and Voyage Recording
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.232(82) - Adoption of the Revised Performance Standards for Electronic Chart Display and Information Systems (ECDIS) - (Adopted on 5 December 2006) - Annex - Revised Performance Standards for Electronic Chart Display and Information Systems (ECDIS) - Module B - Operational and Functional Requirements - 11 Route Planning, Monitoring and Voyage Recording

11 Route Planning, Monitoring and Voyage Recording

  11.1 It should be possible to carry out route planning and route monitoring in a simple and reliable manner.

  11.2 The largest scale data available in the SENC for the area given should always be used by the ECDIS for all alarms or indications of crossing the ship’s safety contour and of entering a prohibited area, and for alarms and indications according to appendix 5.

Parent topic: Module B - Operational and Functional Requirements

11.3 Route Planning

  11.3.1 It should be possible to carry out route planning including both straight and curved segments.

  11.3.2 It should be possible to adjust a planned route alphanumerically and graphically including:

  • .1 adding waypoints to a route;

  • .2 deleting waypoints from a route; and

  • .3 changing the position of a waypoint.

  11.3.3 It should be possible to plan one or more alternative routes in addition to the selected route. The selected route should be clearly distinguishable from the other routes.

  11.3.4 An indication is required if the mariner plans a route across an own ship’s safety contour.

  11.3.5 An indication should be given if the mariner plans a route closer than a user-specified distance from the boundary of a prohibited area or a geographic area for which special conditions exist (see appendix 4). An indication should also be given if the mariner plans a route closer than a user-specified distance from a point object, such as a fixed or floating aid to navigation or isolated danger.

  11.3.6 It should be possible for the mariner to specify a cross track limit of deviation from the planned route at which an automatic off-track alarm should be activated.

11.4 Route monitoring

  11.4.1 For route monitoring the selected route and own ship’s position should appear whenever the display covers that area.

  11.4.2 It should be possible to display a sea area that does not have the ship on the display (e.g. for look ahead, route planning), while route monitoring. If this is done on the display used for route monitoring, the automatic route monitoring functions (e.g. updating ship's position, and providing alarms and indications) should be continuous. It should be possible to return to the route monitoring display covering own ship’s position immediately by single operator action.

  11.4.3 ECDIS should give an alarm if, within a specified time set by the mariner, own ship will cross the safety contour.

  11.4.4 ECDIS should give an alarm or indication, as selected by the mariner, if, within a specified time set by the mariner, own ship will cross the boundary of a prohibited area or of a geographical area for which special conditions exist (see appendix 4).

  11.4.5 An alarm should be given when the specified cross track limit for deviation from the planned route is exceeded.

  11.4.6 An indication should be given to the mariner if, continuing on its present course and speed, over a specified time or distance set by the mariner, own ship will pass closer than a user-specified distance from a danger (e.g. obstruction, wreck, rock) that is shallower than the mariner’s safety contour or an aid to navigation.

  11.4.7 The ship's position should be derived from a continuous positioning system of an accuracy consistent with the requirements of safe navigation. Whenever possible, a second independent positioning source, preferably of a different type, should be provided. In such cases ECDIS should be capable of identifying discrepancies between the two sources.

  11.4.8 ECDIS should provide an alarm when the input from position, heading or speed sources is lost. ECDIS should also repeat, but only as an indication, any alarm or indication passed to it from position, heading or speed sources.

  11.4.9 An alarm should be given by ECDIS when the ship reaches a specified time or distance, set by the mariner, in advance of a critical point on the planned route.

  11.4.10 The positioning system and the SENC should be on the same geodetic datum. ECDIS should give an alarm if this is not the case.

  11.4.11 It should be possible to display alternative routes in addition to the selected route. The selected route should be clearly distinguishable from the other routes. During the voyage, it should be possible for the mariner to modify the selected sailing route or change to an alternative route.

  11.4.12 It should be possible to display:

  • .1 time-labels along a ship’s track manually on demand and automatically at intervals selected between 1 and 120 minutes; and

  • .2 an adequate number of: points, free movable electronic bearing lines, variable and fixed range markers and other symbols required for navigation purposes and specified in appendix 3.

  11.4.13 It should be possible to enter the geographical co-ordinates of any position and then display that position on demand. Also, it should be possible to select any point (features, symbol or position) on the display and read its geographical co-ordinates on demand.

  11.4.14 It should be possible to adjust the displayed geographic position of the ship manually. This manual adjustment should be noted alpha-numerically on the screen, maintained until altered by the mariner and automatically recorded.

  11.4.15.1 ECDIS should provide the capability to enter and plot manually obtained bearing and distance lines of position (LOP), and calculate the resulting position of own ship. It should be possible to use the resulting position as an origin for dead-reckoning.

  11.4.15.2 ECDIS should indicate discrepancies between the positions obtained by continuous positioning systems and positions obtained by manual observations.

11.5 Voyage recording

  11.5.1 ECDIS should store and be able to reproduce certain minimum elements required to reconstruct the navigation and verify the official database used during the previous 12 hours. The following data should be recorded at one minute intervals:

  • .1 to ensure a record of own ship’s past track: time, position, heading, and speed; and

  • .2 to ensure a record of official data used: ENC source, edition, date, cell and update history.

  11.5.2 In addition, ECDIS should record the complete track for the entire voyage, with time marks at intervals not exceeding 4 hours.

  11.5.3 It should not be possible to manipulate or change the recorded information.

  11.5.4 ECDIS should have a capability to preserve the record of the previous 12 hours and of the voyage track.

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