NAV 44/7/4
3.1.5 Provision of chart information
.1 The chart information to be used
should be the latest editions of that originated by a 1
government hydrographic office, and based on IHO
standards or the standards of the originating
Hydrographic Office.
.2 It should not be possible to alter the contents
of the electronic chart information.
.3 The chart or chart data edition and issuing date
should be indicated.
3.1.6 updating - The information
displayed by the RCDS back-up arrangements should be
up-to-date for the entire voyage.
3.1.7 scale - If an electronic device is
used, it should provide an indication:
.1 if the information is displayed
at a larger scale than that contained in the data base,
and
.2 if own ship's position is covered by a chart at a
larger scale than that provided by the system.
3.1.8 If radar and other navigational
information are added to an electronic back-up display, all
the corresponding requirements of this performance standard
should be met.
3.1.9 If an electronic device is used,
the display mode and generation of the neighbouring area
should be in accordance with section 7 of this performance
standard.
3.1.10 Voyage recording - The back-up
arrangements should be able to keep a record of the ship's
actual track, including positions and corresponding times.
3.2 Reliability and accuracy
3.2.1 The back-up arrangements should
provide reliable operation under prevailing environments and
normal operating conditions.
3.2.2 Accuracy shall be in accordance
with section 11.1 of this performance standard.
3.3 Malfunctions, warnings, alarms
and indications
If an electronic devices is used, it should provide a
suitable indication of system malfunction.
4. OPERATIONAL REQUIREMENTS
4.1 Ergonomics
If an electronic device is used, it should be
designed in accordance with the ergonomic principles of RCDS.
4.2 Presentation of information
4.2.1 Colours and symbols used in the
back-up^arrangements should be based on IHO recommendations
or on the recommendations of the hydrographic office
originating an official RNC covering the area being
navigated.
4.2.2 If an electronic device is used,
the effective size of the chart presentation shall be in
accordance with section 9.2 of this performance standards.
5. POWER SUPPLY
5.1 If an electronic device is used:
.1 the back-up power supply should
be separate from the RCDS; and
.2 conform to the requirements in this RCDS
performance standard.
6. CONNECTIONS WITH OTHER EQUIPMENT
6.1 If an electronic device is used,
it should:
.1 be connected to systems providing
continuous position-fixing capability; and
.2 not degrade the performance of any equipment
providing sensor input.
6.2 If radar with RNC data or with
selected parts of the ENC chart information overlaid is used
as an element of the back-up, the radar should comply with
resolution A.477(XII), as amended.
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