Standard Horizon HX870 Owner's Manual page 123

6. Marine vessels equipped with VHF radios are required to monitor Channel
16.
7. 156.050 MHz and 156.175 MHz are available for port operations and
commercial communications purposes when used only within the U.S. Coast
Guard designated Vessel Traffic Services (VTS) area of New Orleans, on
the lower Mississippi River from the various pass entrances in the Gulf of
Mexico to Devil's Swamp Light at River Mile 242.4 above head of passes
near Baton Rouge.
8. 156.250 MHz is available for port operations communications use only
within the U.S. Coast Guard designated VTS radio protection areas of New
Orleans and Houston described in Sec. 80.383. 156.250 MHz is available
for intership port operations communications used only within the area of
Los Angeles and Long Beach harbors, within a 25- nautical mile radius of
Point Fermin, California.
9. 156.550 MHz, 156.600 MHz and 156.700 MHz are available in the U.S.
Coast Guard designated port areas only for VTS communications and
in the Great Lakes available primarily for communications relating to the
movement of ships in sectors designated by the St. Lawrence Seaway
Development Corporation or the U.S. Coast Guard. The use of these
frequencies outside VTS and ship movement sector protected areas is
permitted provided they cause no interference to VTS and ship movement
communications in their respective designated sectors.
10. 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.
11. 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
Mid-channel Lighted Whistle Buoy to mile 242.4 above Head of Passes
near Baton Rouge. Additionally 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.
12. Use of 156.375 MHz is available for navigational communications only in
the Mississippi River from South Pass Lighted Whistle Buoy "2" and South-
HX870 Page 123