Division 5.2 Navigation mode

In navigation mode, the Inland ECDIS display shall be integrated with the own vessel's radar information.

The radar information shall be clearly distinguishable from the SENC information.

The integrated display shall be in accordance with the requirements for radar on inland waterways as specified in Chapter 4.14 of Section 4 of this Annex.

The chart and the radar image shall match in size, position and orientation within the limits as specified in Chapters 3.4 and 8.3.2 of Section 4 of this Annex.

The integrated display shall only be presented in the head-up orientation. Other orientations are permitted in systems with an additional maritime ECDIS type approval. If such a system is used in true motion and/or north-up mode on European inland waterways, it is considered to be working in information mode.

It shall be possible for the operator to adjust the off-set values between the positions of the position sensor and the radar antenna of the vessel so that the SENC display matches the radar image.

It shall be possible to temporarily remove either the ECDIS or the radar information by a single operator action.

The vessel's position shall be derived from a continuous positioning system, the accuracy of which is consistent with the requirements of safe navigation.

Navigation mode shall provide an indication when the input from the position-fixing system is lost.

Navigation mode shall also repeat, but only as an indication, any alarm or indication passed to it from a position fixing system.

The positioning system and the SENC shall be based on the same geodetic datum.

In navigation mode, the data referred to in Chapter 3.1, point (c), first to seventh indent of this Section, and the following elements shall always be visible and shall not be obscured by other objects:

• Headline line (as required by ETSI EN 302 194-1, see document referred to in Chapter 2, point (f) of Section 1)

• Bearing line (as required by ETSI EN 302 194-1, see document referred to in Chapter 2, point (f) of Section 1)

• Range rings (as required by ETSI EN 302 194-1, see document referred to in Chapter 2, point (f) of Section 1)

• Navigation lines (as required by ETSI EN 302 194-1, see document referred to in Chapter 2, point (f) of Section 1)

• P-Lines

• Buoys

• Inland AIS symbols

• Inland AIS labels (if displayed)

• AtoN information.

The transparency of the radar overlay shall therefore be user defined. It shall be possible to switch Inland AIS labels off either manually or on base of a configured timeout value.

Information regarding the position and orientation of other vessels, gathered by other communication links than the own radar, may be displayed only if they are up-to-date (nearly real-time) and meet the accuracy that is required for the support of tactical and operational navigation. Position information of the own vessel that is received from a repeater station shall not be displayed.

As tracking and tracing information (for example AIS) of other vessels is useful for the planning of the passing, but of no use during passing itself, tracking and tracing (AIS) symbols shall not disturb the radar image during passing and shall be faded out therefore. Preferably the application shall allow the skipper to define the area where the symbol is faded out.

If the heading of other vessels is available, the position and the orientation of those other vessels may be presented by

• a directed triangle, or

• a true outline (to scale).

In all other cases a generic symbol shall be used (an octagon is recommended, a circle shall not be used for applications which are certified according to maritime standards).

Information that another vessel is carrying blue cones or lights may be displayed by a different colour of the vessel symbol. The number of the blue cones/lights shall only be displayed in the pick report.

Information on the intention of another vessel to pass on starboard (blue sign) may only be displayed on the right side of the directed triangle symbol or of the scaled shape if the heading of this vessel is available. If no heading information is available the information shall only be displayed in a direction independent form.

Information regarding the position of AIS base stations, AIS Aids to Navigation (ATON) and AIS Search and Rescue Transmitters (SART) may be displayed, if the symbols can be distinguished from other symbols (e.g. symbols 2.10 and 2.11 of IEC 62288 Ed. 2, Table A.1).