INTERNATIONAL
MARITIME ORGANIZATION
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IMO
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NAV 44/7/11
29 May 1998
Original: ENGLISH
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SUB-COMMITTEE ON SAFETY OF
NAVIGATION
44th session
Agenda item 7.2
NAVIGATIONAL AIDS AND RELATED
MATTERS
Performance standards for Raster
Chart Display Systems
Note by the Russian Federation
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SUMMARY
|
| Executive
Summary: |
This document
contains comments
and proposals on
the draft performance
standards for
RCDS. |
| Action to be Taken: |
Consider the text of the
submission. |
| Related documents: |
NAV 42/7/18, NAV 43/7/9, NAV
44/7/8. |
|
This document is
submitted in accordance with
the provisions of
paragraph 45.4 of the Guidelines
on the organization
and method of work of the MSC
and MEPC and their
subsidiary bodies (MSC/Circ.8
1 6 and MEPC/Circ.331).
It comments on its paragraph
3 on NAV 44/7/8,
paragraph 4.
1 In document NAV 43/7/9 the Russian
Federation expressed Its negative
opinion on the
adoption of the performance standards
for raster
chart display systems (RCDS)
which recognize RCDS
with raster navigational charts
(RNC) as equivalent
to paper charts.
2 Trials of RCDS conducted at simulator
centres in the Russian Federation
have proved that
functional limitations of RCDS
and RNC do not allow
to fulfill some 30 per cent of
the most important
requirements of resolution A.817(19)
which specifies
minimal performance requirements
to ECDIS as a legal
equivalent to the paper navigational
chart. The said
limitations cannot be eliminated
by modifying RCDS
design, since they arise from
the very nature of
raster display of information.
3 At the IHO meeting on 23-24 February
1998 it was proposed that RCDS
operation be Included
as an additional mode into the
ECDIS performance
standards (NAV 44/7/8, paragraph
4). As far as
ensuring the safety of navigation
is concerned, this
proposal seems unacceptable because
of ignoring the
human factor. When changing-over
to RCDS from ECDIS
wherein all alarms specified
in resolution A.817(19)
and generated on the basis of
vector cartographic
data analysis were provided automatically,
the
mariner will, through inertia,
expect from RCDS the
same functional capabilities
as these available with
vector charts. The lack of the
automatic alarms and
danger warnings, together with
the necessity. for
adapting the mariner to other
form of electronic
chart display and for simultaneously
referring to the
paper chart, may result in emergency.
For reasons of economy, this document is
printed in a limited
number. Delegates are
kindly asked to bring
their copies to
meetings and not to request
additional
copies.
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I:/NAV/44/7-11.WPD
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