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					                                                                  RTCM Paper 138-2008-SC101-223


                             Radio Technical Commission for Maritime Services
                                           1800 N. Kent St., Suite 1060
                                          Arlington, Virginia 22209-2109
                                         www.rtcm.org         hq@rtcm.org


Telephone: +1-703-527-2000                                     Telefax: +1-703-351-9932

                                                                                  July 24, 2008

                                    SUMMARY RECORD

                         Meeting of RTCM Special Committee 101
                               and Special Committee 110
                         GPS-equipped Portable VHF-FM Radios


Time / Dates: 09:00 a.m. Wednesday, May 7, 2008

Location:      RTCM Annual Assembly Meeting, Catamaran Resort, San Diego

1      Call to order, introduction of attendees, and approval of agenda

The meeting was called to order by Mr. Hoffman. Mr Renaud of Transport Canada kindly
agreed to act as secretary and took the minutes of the meeting. The agenda, Paper 078-2008-
SC101-220 was approved with one additional item, the Class H DSC Presentation that was given
at the RTCM Assembly the previous day. The following persons were in attendance:

NAME               AFFILIATION             TELEPHONE              E-MAIL
                                           FAX
Chris Hoffman      .PROCON, Inc.           +44-1489880326         chris@hoffmanfreeserve.co.uk
Kerry Greer        ACR Electronics         +1 954 981-3333        kgreer@acrelectronics.com
                                           x2124
Doug Ritter        Equipped to Survive     +1 480 598-1501        dritter@equipped.org
                   Foundation
Ghassan Khalek     FCC                     +1 202 418 2771        gkhalek@fcc.gov
Masaaki            Icom                    +1 425 450 6043        masaakitakahashi@icomameri
Takahashi                                                         ca.com
Fred Kissel        NASA/MEI                +1 410 344 1443        fkissel@verizon.net
Jim Christo        NASA/GSFC               +1 30l-286-9015        James.W.Christo@nasa.gov
                                           fax: 301-286-1770
Craig Duncan       Standard                +61 9844 6650          cduncan@gme.net.au
                   Communications          Fax +61 9844 6600
Kevin Page         ICS Electronics         +44 7903 731101        kevin@icselectronics.co.uk
Peter Forey        Sartech Engineering     +44 1737 372670        pforey@sartech.com
Russ Renaud        Transport Canada –      +1 613 998 0602        renauru@tc.gc.ca
                   Maritime Safety
George E.          Whiffletree Corp.,      +1 207 647-3300        glcl@bellatlantic.net
Lariviere          Inc.                    +1 207 647-3700
                                                                     RTCM Paper 138-2008-SC101-223



2      Approval of summary record of previous meeting (Paper 076-2008-SC101-218)

The summary record of the previous meeting was approved as written.

2a     Additional Item – Class H DSC Presentation

The presentation on Proposed Class H DSC Hand Held VHF Radio with GPS (Paper 136-2008-
SC101-221) as presented at the RTCM Annual Assembly meeting the previous day was made
again for the benefit of SC101 and SC110 members who were not at the assembly meeting. The
presentation mainly highlighted the differences between the current ITU Class D standard and
the new proposed Class H standard. There was some discussion on the use of the term “Class”
as opposed to “Category”, a decision between these two terms was held over until the next
meeting.

3      Status of ITU Working Party 8B contribution (revision to ITU-R M.493)

Following the ITU Working Party 5B meeting in February and the preparation of a liaison
statement to IMO and CIRM (RTCM Paper 063-2008-SC101-216) the IMO COMSAR Sub-
Committee met in April and discussed the issue of VHF DSC and prepared a Liaison Statement
back to ITU WP 5B on the subject. Although this was really targeted at Class D DSC rather
than Class H it is still extremely relevant to this group. A copy of the liaison statement is
therefore reproduced below for information.

      LIAISON STATEMENT FROM IMO COMSAR 12 TO ITU-R WP 5B
 RECOMMENDATION ITU-R M.493-12 ON DIGITAL SELECTIVE CALLING SYSTEM
             FOR USE IN THE MARITIME MOBILE SERVICE

1. IMO would like to thank the ITU-R for the revised version of Recommendation ITU-R M.493,
adopted by ITU-R Study Group 8 and approved by consultation, and the liaison statement
(Document 8B/TEMP/269) concerning clarification of Recommendation ITU-R M.493-12 on
Digital Selective Calling issues.

2. The Sub-Committee on Radiocommunications and Search and Rescue (COMSAR), at its
twelfth session (7 to 11 April 2008), studied the revised recommendation. It was noted that the
ITU-R now recommends that distress relay calls are included in the definition of Class D DSC.
In fact there now appears to be very little difference between Class D and Class B DSC at VHF
whereas the recommendation describes Class D as a “simplified” version of DSC equipment. It
was considered that attempts to introduce additional functionalities in DSC equipment intended
for use on non-SOLAS ships has the potential to degrade the smooth operation of the GMDSS.

3. IMO wishes to inform ITU-R that IMO’s MSC/Circ.803 contains the guidelines of the
Organization on the functional requirements of the GMDSS appropriate to allow effective
participation of non-SOLAS ships in the GMDSS. Class D DSC was originally introduced to
facilitate MSC/Circ.803 by providing the functional requirements of basic distress, safety and
urgency alerting to other stations. Distress relay functions were not included as they were
considered to be not appropriate for operators with limited training and this is consistent with
COMSAR/Circ.25 and Recommendation ITU-R M.541.
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                                                                  RTCM Paper 138-2008-SC101-223



4. ITU-R is accordingly requested not to include in the description and tables for class D VHF
DSC the transmission and acknowledgement of distress relays and distress relays on behalf of
someone else (DROBOSE) nor add further call types for Class D DSC in Recommendation ITU-
R M.493.

5. ITU-R are accordingly requested to review the annexes to ensure compliance with
COMSAR/Circ.25 and Recommendation ITU-R M.541, while noting that this does not detract
from their current status as examples of equipment design.

6. IMO thanks ITU-R for their work in revising Recommendation ITU-R M.493 but advises that,
since DSC is now a well established system of some 30 years standing, any proposed changes
should be confirmed by sufficient studies and testing, which could include field trials of
equipment, before the changes to the system are recommended.

In summary IMO noted that DSC Class D equipment should not include an excessive degree of
functionality that would be inappropriate for use on non-SOLAS vessels, and therefore ITU
should be requested to remove all extra functions for Class D equipment, such as distress relays
and DROBOSEs from ITU-R M.493.


Since the next revision of ITU-R M.493 can be made in March 2009, members were encouraged
to submit proposals to the October 2008 meeting of ITU WP5B.

The fact that it now looks like Class D DSC will revert back to something much closer to the
proposed Class H means that we might no longer need to introduce a new Class H.

In addition we understand that there is a joint IMO / ITU Experts Group meeting planned to be
held next month (June) and that the subject of Class H DSC will be discussed at that meeting.

The committee decided to wait and see what the outcome of the joint IMO / ITU Experts Group
meeting would be and what if any proposals / papers were planned for the next ITU 5B meeting.

4       Review of relevant documents

The committee reviewed a new paper 137-2008-SC101-222 which provided a Draft Table of
Equipment Function vs Class. The following points were noted during the review of the Table
on equipment function.

       There was some debate over the minimum display requirement with regard to size and
        number of characters, no decision was reached and further discussion on this topic is
        required.

       There was a discussion on the need / option for a “Function” key to allow fewer keys to
        be implemented on the radio with 2 (or even 3) functions to each key. There are
        advantages and disadvantages to this and again further discussion is required on this
        subject.

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                                                                     RTCM Paper 138-2008-SC101-223


       There was some debate over the meaning of the word “integral” as to whether this meant
        that an item was built into the radio or just permanently attached to it (e.g. by a fixed
        cable). It was agreed to clarify the use of the word “integral” in each instance that it was
        used in the standard.

       Following on from the “integral” discussion there was a debate on whether the radio’s
        speaker and microphone should be built into the radio to reduce cost or should be
        permitted to be permanently attached to the radio by a fixed cable. It was determined
        that this decision should be left to the manufacturer.

       Following a discussion of the DSC functions on the radio it was agreed that the “Manual
        DSC Call” and “Directory DSC Call” functions should be merged into one.

       Finally there was a view expressed in the meeting that the radio should be capable of
        displaying its own position on the display (from the built in GPS Receiver) such that a
        Mayday call made on Ch 16 could easily include position for the benefit of non-DSC
        equipped vessels of opportunity.

5       Review and revision of draft standard

The committee felt that further review of the draft standard (paper 077-2008-SC101-219) would
not be productive at this time until decisions had been made on the Equipment Functions and
Features to be included in each Class of radio (see Agenda Item 4 above) together with a
determination of the tests to be performed on each radio as outlined in paper 064-2008-SC101-
217, so that these could all be added to the draft.

The committee briefly reviewed paper 064-2008-SC101-217 and made the following comments:

       It was suggested that a cross reference be added between JIS 7 and IPXX, to aid those not
        familiar with the JIS standard.

       For U.S. FCC certification, emissions and susceptibility testing (conducted and radiated)
        may be subject to 47 CFR Part 2 (with the exclusion for maritime equipment) as well as
        Part 15. It was felt that the FCC EMC test requirements were preferable to either ETSI
        or IEC 60945, but that this decision should be reviewed again.

6       Based upon discussions under agenda items 4 and 5; development of the future
        work plan for SC101/SC110.

The committee will continue to work on the Function / Test Tables and Draft Standard at its next
meeting and will review the status of the Class D / H work in ITU.

7       Other business

The proposed Classes of radio were discussed and in particular the suggested Class 3 radio
which is considered to be a possible replacement for the current GMDSS Survival Craft Radio.
It was suggested that Mr Markle raise this subject with the GMDSS Task Force and the USCG
and determine whether there was any interest in submitting a paper to COMSAR 13 on the
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                                                                    RTCM Paper 138-2008-SC101-223


subject of a GMDSS Survival Craft DSC Hand Held Radio with GPS.

It was requested that all the papers discussed at the meeting be posted to the RTCM papers site.

8      Assignment of Action Items for next meeting

Action Items from Previous Meeting

Mr. Markle to prepare one-page letter to manufacturers to drum up support at CIRM. DONE

Mr. Hoffman to develop table of function vs class. DONE

Mr. Hoffman to update draft standard – others to provide comments and suggestions.
OUTSTANDING, Awaiting input from above Function Table and Test Table.

Action Items from this Meeting

Mr Hoffman to update the draft standard where possible as described above.

All committee members to review the Function Table paper 137-2008-SC101-222 and Test
Table paper 064-2008-SC101-217 prior to the next meeting and to come prepared to try and
finalize both tables at the meeting.

Mr Markle to discuss with the GMDSS Task Force and the USCG if there is any interest in
submitting a paper to COMSAR 13 on the subject of a GMDSS Survival Craft DSC Hand Held
Radio with GPS.

Mr Markle to post all papers on the RTCM paper site.

9      Date and Venue for next meeting

The committee will meet, Tuesday, September 9, 2008 at 09:30 in the RTCM Offices in
Arlington VA.




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