Standard Horizon HX-471S - Manual (Page 54)

HX471S Page 52
4: Use of 156.875 MHz is limited to communications with pilots regarding the movement and docking
of ships. Normal output power must not exceed 1 watt.
5: 156.375 MHz and 156.650 MHz are available primarily for intership navigational communications.
These frequencies are available between coast and ship on a secondary basis when used on or in
the vicinity of locks or drawbridges. Normal output power must not exceed 1 watt. Maximum output
power must not exceed 10 watts for coast stations or 25 watts for ship stations.
6: On the Great Lakes, in addition to bridge-to-bridge communications, 156.650 MHz is available for
vessel control purposes in established vessel traffic systems. 156.650 MHz is not available for use in
the Mississippi River from South Pass Lighted Whistle Buoy “2” and Southwest Pass entrance
Midchannel Lighted Whistle Buoy to mile 242.4 above Head of Passes near Baton Rouge. Addition-
ally it is not available for use in the Mississippi River-Gulf Outlet, the Mississippi River-Gulf Outlet
Canal, and the Inner Harbor Navigational Canal, except to aid the transition from these areas.
7: Use of 156.375 MHz is available for navigational communications only in the Mississippi River from
South Pass Lighted Whistle Buoy “2” and Southwest Pass entrance Mid-channel Lighted Whistle
Buoy to mile 242.4 above head of Passes near Baton Rouge, and in addition over the full length of
the Mississippi River-Gulf Outlet Canal from entrance to its junction with the Inner Harbor Navigation
Canal, and over the ull length of the Inner Harbor Navigation Canal from its junction with the Missis-
sippi River to its entry to Lake Pontchartrain at the New Seabrook vehicular bridge.
8: Within 120 km (75 miles) of the United States/Canada border, in the area of the Puget Sound and
the Strait of Juan de Fuca and its approaches, 157.425 MHz is half of the duplex pair designated as
Channel 88. In this area, Channel 88 is available to ship stations for communications with public
coast stations only. More than 120 km (75 miles) from the United States/Canada border in the area
of the Puget Sound and the Strait of Juan de Fuca, its approaches, the Great Lakes, and the St.
Lawrence Seaway, 157.425 MHz is available for intership and commercial communications. Outside
Puget Sound area and its approaches and the Great Lakes, 157.425 MHz is also available for
communications between commercial fishing vessels and associated aircraft while engaged in com-
mercial fishing activities.
9: When the frequency 156.850 MHz is authorized, it may be used additionally for search and rescue
training exercises conducted by state or local governments.
10: The frequency 156.850 MHz is additionally available to coast stations on the Great Lakes for trans-
mission of scheduled Coded Marine Weather Forecasts (MAFOR), Great Lakes Weather Broadcast
(LAWEB) and nscheduled Notices to Mariners or Bulletins. F3C and J3C emissions are permitted.
Coast Stations on the Great Lakes must cease weather broadcasts which cause interference to
stations operating on 156.800 MHz until the interference problem is resolved.
11: The frequency 157.100 MHz is authorized for search and rescuetraining exercises by state or local
government in conjunction with U.S. Coast Guard stations. Prior U.S. Coast Guard approval is re-
quired. Use must cease immediately on U.S. Coast Guard request.
12: The duplex pair for channel 20 (157.000/161.600 MHz) may be used for ship to coast station com-
munications.
13: Available for assignment to coast stations, the use of which is in accord with an agreed program, for
the broadcast of information to ship stations concerning the environmental conditions in which ves-
sels operate, i.e., weather; sea conditions; time signals; notices to mariners; and hazards to naviga-
tion.
14: Available only in the Puget Sound and the Strait of Juan de Fuca.
15: The frequency 156.525 MHz is to be used exclusively for distress, safety and calling using digital
selective calling techniques. No other uses are permitted.
16: The frequency 156.450 MHz is available for intership, ship and coast general purpose calling by
noncommercial vessels, such as recreational boats and private coast stations.
17: The frequency 156.425 MHz is assigned by rule to private coast stations in Alaska for facsimile
transmissions as well as voice communications.