Resolution MSC.114(73)
PERFORMANCE STANDARDS FOR SHIPBORNE DGPS AND DGLONASS MARITIME RADIO BEACON
RECEIVER EQUIPMENT, REVISED IN 2000
(adopted
on 5 December 2000)
THE
MARITIME SAFETY COMMITTEE,
RECALLING
Article (28(b) of the Convention on the International Maritime Organization
concerning the functions of the Committee,
RECALLING
ALSO resolution A.886(21), by which the Assembly resolved that the function of
adopting performance standards and technical specifications, as well as
amendments thereto shall be performed by the Maritime Safety Committee and/or
the Marine Environment Protection Committee, as appropriate, on behalf of the
Organization,
NOTING
that differential services broadcast information for augmenting the Global
Positioning System (GPS) and the Global Navigation Satellite System (GLONASS)
to provide the accuracy and integrity required for entrances and harbour
approaches and other waters in which the freedom to manoeuvre is limited,
NOTING
ALSO that shipborne maritime radio beacon receiving equipment providing
augmentation information to position-fixing equipment should be designed to
satisfy the detailed requirements of the particular system concerned,
RECOGNIZING
the need to improve the previously adopted by resolution MSC.64(67), Annex 2
performance standards for shipborne DGPS and DGLONASS maritime radio beacon
receiver equipment in order to ensure the operational reliability of such
equipment and taking into account the technological progress and experience
gained,
HAVING
CONSIDERED the recommendation on the revision of resolution MSC.64(67), Annex 2
made by the Sub-Committee on Safety of Navigation at its forty-sixth session,
1.
ADOPTS the Recommendation on Performance Standards for Shipborne DGPS and
DGLONASS Maritime Radio Beacon Reciever Equipment, revised in 2003, out in the
Annex to the present resolution;
2.
RECOMMENDS Governments to ensure that DGPS and DGLONASS maritime radio beacon
receiver equipment:
a) if installed on or after
1 July 2003, conform to performance standards not inferior to those specified
in the Annex to the present resolution; and
b) if installed on or after
1 January 1999 but before 1 July 2003, conform to performance standards not
inferior to those specified in the annex to resolution MSC.64(67), Annex 2.
Annex.
RECOMMENDATION ON PERFORMANCE STANDARDS FOR SHIPBORNE DGPS AND DGLONASS
MARITIME RADIO BEACON RECEIVER EQUIPMENT, REVISED IN 2000
1.1
Differential services broadcast information for augmenting the Global
Positioning System (GPS) and the Global Navigation Satellite System (GLONASS)
to provide the accuracy and integrity required for entrances and harbour
approaches and other waters in which the freedom to manoeuvre is limited.
Various service providers are broadcasting differential information applicable
to localized areas. Different services provide information for augmenting GPS,
GLONASS, or both.
1.2
Receiver equipment for the reception and proper decoding of differential GPS
and GLONASS maritime radio beacon broadcasts (fully compliant with
Recommendation ITU-R M.823) intended for navigational purposes on ships with
maximum speeds not exceeding 70 knots should, in addition to the general
requirements contained in resolution A.694(17)*, comply with the following
minimum performance requirements.
_____________
* Refer to IEC 6945 Publication.
1.3
These standards cover the basic requirements of maritime radio beacon receiver
equipment providing augmentation information to position-fixing equipment. It
does not cover other computational facilities which may be in the equipment.
2. DGPS AND DGLONASS MARITIME RADIO BEACON
RECEIVER EQUIPMENT
The
words DGPS and DGLONASS maritime radio beacon receiver equipment as used in
these performance standards include all the components and units necessary for
the system to properly perform its intended functions. The equipment should
include the following minimum facilities:
.1 antenna capable of
receiving DGPS or DGLONASS maritime radio beacon signals;
.2 DGPS and DGLONASS
maritime radio beacon receiver and processor;
.3 receiver control
interface; and
.4 data output interface.
The
DGPS and DGLONASS maritime radio beacon receiver equipment should:
.1 operate in the band of
283.5 to 315 kHz in Region 1 and 285 to 325 kHz in Regions 2 and 3 in
accordance with Recommendation ITU-R M.823;
.2 provide means of
automatically and manually selecting the station:
.3 make the data available
for use with a delay not exceeding 100 ms after its reception;
.4 be capable of acquiring a
signal in less than 45 s in the presence of electrical storms;
.5 have at least one serial
data output that conforms to the relevant international marine interface
standard*;
____________
* Refer to IEC Publication 61162.
.6 have an omni-directional
antenna in the horizontal plane; and
.7 be capable of operating
satisfactorily in typical interference conditions.
Precautions
should be taken to ensure that no permanent damage can result from an
accidental short circuit or grounding of the antenna or any of its input or
output connections or any of the DGPS and DGLONASS maritime radio beacon
receiver equipment inputs or outputs for a duration of 5 min.