**United States of America**

**DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE**

**Maritime Advanced HF Data Services**

**Agenda Item 1.13:** *taking into account Resolutions **729 (WRC-97),
351 (WRC-03)** and **544 (WRC-03),** to review the allocations to all
services in the HF bands between 4 MHz and 10 MHz, excluding those
allocations to services in the frequency range 7 000-7 200 kHz and those
bands whose allotment plans are in Appendices **25**, **26** and **27**
and whose channelling arrangements are in Appendix **17**, taking
account of the impact of new modulation techniques, adapting control
techniques and spectrum requirements for HF broadcasting*.

**Background Information:** This is a very broad agenda item, as there
are multiple services allocated to the HF bands between 4 MHz and 10
MHz, including aeronautical mobile (OR), aeronautical mobile (R),
amateur, broadcasting, fixed, maritime mobile and mobile services.
Agenda item 1.13 covers three resolutions that deal with three separate
issues. These issues are connected within the agenda item on the basis
that they cover overlapping frequency ranges.

**Issue 1:** Resolution 351 under this agenda item addresses the
introduction of new digital technology into the frequency and channel
arrangements (Appendix 17) in the MF and HF bands allocated to the
maritime mobile service. The required changes to Appendix 17 must be
carefully addressed for this issue and should be addressed at the next
world radiocommunication conference (WRC) to be held (2011/12). This
requires modification of Resolution 351 to focus work in the SG process
on identifying the required changes and how best to accomplish them
within Appendix 17. In addition, WRC-07 needs to address the use of
radiotelephony channels by emerging digital systems. To accomplish this,
a proposed footnote has been developed for the radio telephony channels.

**Issue 2:** Resolution 544 under this agenda item addresses the
introduction of additional allocations for the broadcasting service,
limited to the 4-10 MHz band with additional restrictions for specific
channelling plans associated with aeronautical and maritime mobile
services. The U.S. supports the CITEL draft IAP calling for no
additional allocation.

**Issue 3:** Resolution 729 under this agenda item addresses the
introduction of adaptive HF systems for the fixed and mobile services in
the 4-30 MHz band. Since such systems have been operating successfully
for many years no change to Article 5 of the radio regulations are
required. However, studies for this issue have uncovered a need for
studies and potential change of the radio regulations to allow emerging
HF technologies through use of wide-band HF systems in the fixed and
mobile services.

**Proposal:**

**USA/ /1 [NOC]{.underline} APPENDIX 17**

**USA/ /2 MOD RESOLUTION 351 (WRC-03)**

RESOLUTION 351 (WRC-07)

Review of the frequency and channel arrangements in the MF and\
HF bands allocated to the maritime mobile service with a view to\
improving efficiency by considering the use of new digital\
technology by the maritime mobile service

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* that the agenda of this Conference included consideration of the
use of new digital technology in the maritime mobile service (MMS) in
the MF and HF bands;

*b)* that the introduction of new digital technology in the MMS shall
not disrupt the distress and safety communications in the MF and HF
bands including those established by the International Convention for
the Safety of Life at Sea (SOLAS), 1974, as amended;

*c)* that changes made in Appendix **17** should not prejudice the
future use of these frequencies or the capabilities of systems or new
applications required for use by the MMS;

*d)* that the need to use new digital technologies in the MMS is growing
rapidly;

*e)* that the use of new digital technology on HF and MF frequencies
allocated to the MMS will make it possible to better respond to the
emerging demand for new services;

*f)* that the HF bands allocated to the MMS for A1A Morse telegraphy are
not used for this purpose and narrow-band direct-printing (NBDP)
allocations are utilized only by a small number of low volume residual
services at present;

that there are new HF data exchange technologies capable of delivering
MSI

*h)* that the IMO supports the frequencies of Appendix **15,**
concerning NBDP, be retained for the foreseeable future.

*i)* that the ITU Radiocommunication Sector is conducting ongoing
studies to improve the efficient use of these bands,

noting

a\) that different digital technologies have already been developed and
are in use in the MF and HF bands in several radiocommunication
services,

b\) that new maritime HF data transfer protocols have already been
developed to replace general narrow-band-direct-printing communications
using Appendix **17** frequencies and mobile frequencies outside
Appendix 17

noting also

that this conference has modified Appendix **17** to permit the use of
various channels or bands identified in the MF and HF bands for the
introduction of new digital technology,

resolves

1 that, in order to provide full worldwide interoperability of equipment
on ships, there should be one technology, or more than one interoperable
worldwide technology to serve the MMS.

2 that, as soon as the ITU‑R studies are completed, a future competent
conference should consider necessary changes to Appendix **17** to
facilitate the use of new technology by the MMS,

invites ITU-R

to finalize studies currently ongoing:

-- to identify future requirements of the MMS;

-- to identify the technical characteristics necessary to facilitate use
of digital systems in the MF and HF bands allocated to the Mobile
Service, taking into account any relevant ITU‑R Recommendations;

-- to identify the digital system(s) to be used in the MF/HF bands by
the MMS;

-- to identify any necessary modifications to the frequency table
contained within Appendix **17**

-- to propose a timetable for the introduction of new digital
technologies and any consequential changes to Appendix **17**;

-- to recommend how digital technologies can be introduced while
ensuring compliance with distress and safety requirements,

instructs the Secretary-General

to bring this Resolution to the attention of the International Maritime
Organization, the International Civil Aviation Organization, the
International Association of Marine Aids to Navigation and Lighthouse
Authorities and the Comité International Radio-Maritime.

**Reasons:** There are still several studies underway that need to be
completed prior to resolving this issue. IMO is still in the process of
developing HF Data system performance requirements. These studies should
be completed prior to the next Conference, where the appropriate changes
to the RR can be considered.

**USA/ /3 MOD**

ARTICLE 5

Frequency allocations

3 230-5 003 kHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **4 063-4 438**       |                       |                       |
| MARITIME MOBILE 5.79A |                       |                       |
| 5.109 5.110 5.130     |                       |                       |
| 5.131 5.132           |                       |                       |
|                       |                       |                       |
| 5.128 5.129 5.XYZ     |                       |                       |
+-----------------------+-----------------------+-----------------------+

5 003-7 450 kHz

7 450-13 360 kHz

+-----------------------+-----------------------+-----------------------+
| Allocation to         |                       |                       |
| services              |                       |                       |
+-----------------------+-----------------------+-----------------------+
| Region 1              | Region 2              | Region 3              |
+-----------------------+-----------------------+-----------------------+
| **8 195-8 815**       |                       |                       |
| MARITIME MOBILE 5.109 |                       |                       |
| 5.110 5.132 5.145     |                       |                       |
|                       |                       |                       |
| 5.111 5.XYZ           |                       |                       |
+-----------------------+-----------------------+-----------------------+

  -----------------------------------------------------------------------
  **12 230-13 200** MARITIME MOBILE 5.109 5.110 5.132 5.145 5.XYZ

  -----------------------------------------------------------------------

13 360-18 030 kHz

  ----------------------- ----------------------- -----------------------
  Allocation to services                          

  Region 1                Region 2                Region 3

  **16 360-17 410**                               
  MARITIME MOBILE 5.109                           
  5.110 5.132 5.145 5.XYZ                         
  ----------------------- ----------------------- -----------------------

18 030-23 350 kHz

  ----------------------- ----------------------- -----------------------
  Allocation to services                          

  Region 1                Region 2                Region 3

  **18 780-18 900**                               
  MARITIME MOBILE 5.XYZ                           
  ----------------------- ----------------------- -----------------------

  -----------------------------------------------------------------------
  **19 680-19 800** MARITIME MOBILE 5.132 5.XYZ

  -----------------------------------------------------------------------

+-----------------------------------------------------------------------+
| **22 000-22 855** MARITIME MOBILE 5.132                               |
|                                                                       |
| 5.156 5.XYZ                                                           |
+-----------------------------------------------------------------------+

23 350-27 500 kHz

  ----------------------- ----------------------- -----------------------
  Allocation to services                          

  Region 1                Region 2                Region 3

  **25 070-25 210**                               
  MARITIME MOBILE 5.XYZ                           
  ----------------------- ----------------------- -----------------------

  -----------------------------------------------------------------------
  **26 100-26 175** MARITIME MOBILE 5.132 5.XYZ

  -----------------------------------------------------------------------

**USA/ /4 ADD**

**5.XYZ** In the bands 4 063-4 438 kHz, 6 200-6 525 kHz, 8 195-8 815
kHz, 12 230-13 200 kHz, 16 360-17 410 kHz, 18 780-18 900 kHz,
19 680-19 800 kHz, 22 000-22 855 kHz, 25 070-25 210 kHz, and
26 100-26 175 kHz allocated exclusively to the maritime mobile service
are used in accordance with Article **52.** The use of HF Data
transmissions in the duplex telephony channels may be used for the
introduction within the maritime mobile service of new HF digital
technologies. Stations using these sub-bands for this purpose shall not
cause harmful interference to, and shall not claim protection from,
other stations operating in accordance with Article **52**.

**Reasons:**

a)  Allow limited use of HF data services in radiotelephony channels
    addressed by Article **52**.

**USA/ /5 SUP**

**Reasons:** The impact to the Fixed and Mobile community is too severe
to allocate additional spectrum to the broadcasters that would, in fact,
come from bands assigned to these services. In addition, the long term
need for additional broadcasting spectrum is unknown. Additional
spectrum reallocated to the broadcast service would result in congestion
to the fixed and mobile service, including the MMS. Congestion is now
present in some fixed and mobile bands. Recent operations supporting
disaster relief demonstrated fixed and mobile service requirements
exceeded the spectrum allocated to these services. Frequencies used by
the Maritime Mobile Service support general and safety related
communications as well as Ship Security Alert Systems communications and
Long Range Tracking and Identification. Any degradation of these
services would have severe consequences.

Improvements in HF technology have increased the importance of HF
radiocommunications for a variety of users. New applications used by the
Fixed and Mobile Service require additional bandwidth to allow higher
data rates. These new technologies now make HF communications viable and
affordable for many applications such as data exchange, fax, messaging,
imagery, and voice

**USA/ / 6 SUP**

**Reasons:** The studies under Resolution **729** have been completed.
These studies have indicated that no changes to the RR are required to
facilitate the introduction of adaptive techniques in the MF/HF bands.

**USA/ / 7 ADD**

RESOLUTION USA_HF (WRC-07)

Bandwidth Requirements for Advanced Fixed and Mobile HF Technologies in
the 3 -- 30 MHz Band

The World Radio communication Conference (Geneva, 2007),

considering

*a)* that there are a limited number of fixed and mobile 3 kHz bandwidth
channels, and many channel bandwidths are below 500 Hz, in the planned
portions of the 3-30 MHz band;

*b)* that trials of advanced fixed and mobile HF frequency systems have
demonstrated their feasibility and their associated spectrum efficiency;

*c)* that advanced fixed and mobile HF frequency systems require larger
channel bandwidth assignments greater than the 3 KHz assignments that
are currently common.

noting

that some advanced fixed and mobile HF frequency adaptive systems
utilize bandwidths of up to 12 kHz to support HF electronic messaging,
HF Internet, and HF file transfer;

resolves to invite ITU-R

1 to determine the feasibility of changing the Radio Regulations to
provide for the use of wider bandwidths to support advanced fixed and
mobile HF systems in the 3 -- 30 MHz band;

2 to bring the results of these studies to the attention of WRC‑\[11\]

**Reasons:** Urgent studies are required to determine the suitability of
changing the radio regulations to allow for wider bandwidths to the
fixed and mobile services to accommodate advanced HF adaptive systems.

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_