EP 1130-2-520
29 Nov 96
(3) USCG District Aids to Navigation Office
c. Special reports shall be provided to the USCG and/or NOS for situations as outlined in
Appendix E. Reports to the USCG will ordinarily be by telephone (within 24 hours - followed by
hard-copy backup) where the information is time-sensitive for navigational use. Reports to NOS
will ordinarily be by letter within 10 days.
d. Notices to Navigation Interests (NTNI) will use a distinctive format (see sample at
Appendix F), and will highlight the waterway/state(s) affected.
(1) NTNI will be distributed by mail to appropriate USCG offices; other affected USACE
elements; other affected Federal, state, or local agencies; port authorities; shipping companies and
vessel operators; and other affected industry and public entities requesting copies. A
limited/reasonable number of copies for each addressee will be distributed free of charge.
(2) A mailing list for NTNI will be maintained and updated at least annually.
e. The prompt dissemination of the latest detailed information concerning channel
conditions is of utmost importance. Necessary measures will be taken to insure that such
information is reported without delay simultaneously to the U.S. Naval Oceanographic Office, the
USCG, the NOS and DMA. When a dangerous shoaling is found during the progress of a survey,
information thereon will be furnished immediately to the abovementioned agencies, so that such
information may be made available to mariners promptly, and buoys shifted to mark the shoal.
Descriptions of any dredging or other operations in important channels in tidal waters, either in
progress, and not already reported, or soon to be undertaken, together with a statement of the
work and expected duration, will also be reported in order that Naval and other vessels may be
warned to look out for dredges and other plant, temporary markers and lights.
f. District commanders having charge of improvements of harbors and waterways shown
on charts of the DMA or of the NOS will send to both offices promptly, as ascertained for the
correction of such charts, the following information: Descriptions of changes in channel location
and depth, or of obstructions that may be discovered, with such prints and other information as
may be necessary to permit the existing charts to be corrected to date. All maps should contain
sufficient data to permit the fixed plane or reference, bench marks, base lines, etc., to be
determined and located. The survey stations should be shown and, when no unreasonable
expenditure of time or labor is involved, the map will show one or more triangulation station(s) of
the NOS in such a way to facilitate connection of old or new work. The source of authority for
the shoreline and topography should be stated on the map. The data supplied should indicate
what charts are affected.
g. When any survey of areas covered by charts of the DMA or the NOS is completed, a
print of each tracing will be sent direct to both the DMA and the NOS. It is not necessary that
tracings be fully complete as to form and title when such prints are made. An informal manuscript
title marked "Advance Sheets", and containing a description sufficient to identify the locality and
the source of the map, will be sufficient.
h. Information relative to the improvement of harbors and waterways such as dredging
operations, and precautions rendered necessary due to the presence of dredging or other plant
will, when considered necessary, be brought to the attention of vessel owners or operators
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