EP 1130-2-520
29 Nov 96
(2) Structures - lock/dams, bridges, overhead crossings (pipelines, power, communication
lines), major shore structures (towers, tanks, radio towers, large buildings), docks and piers,
selected waterfront facilities, mooring and protection cells. Sewage facilities and raw water
intakes or outfalls.
(3) Obstructions and dangers - obstructions which are of a permanent or continuing
nature (fixed location), including known wrecks and bars, pilings, submerged rocks, regulating
structures (e.g., wing dams or dikes).
(4) Aids to navigation - navigation lights, daybeacons and daymarks (as established by the
USCG and listed in the USCG Light List), permanent (lighted) buoys (as shown in the USCG
Light List), and selected private aids to navigation (especially if lighted).
NOTE: Temporary (unlighted) buoys shall NOT be marked on charts, since their frequent
change in number and position make them unreliable for establishing vessel position. Exception
for pooled waters: unlighted buoys may be shown on charts, if accompanied (on each page where
they are shown) with a special note that "Unlighted buoys are shown in common or typical
locations, however their number and position are changed frequently where needed. The position
of unlighted buoys shown on this chart should not be used by the navigator for locating his
position."
(5) Other navigational information - sailing lines, river mileposts, river gages, direction of
river flow (arrow).
(6) Limits and special operating areas - restricted areas submerged pipelines, submarine
cable crossings, barge fleeting areas.
f. Chart Standards.
(1) A scale of 1"= 2000' will ordinarily be used, except where larger or smaller scale is
more appropriate for the level of detail needed or size of area covered.
(2) Choice of colors should be consistent with NOAA Chart No. 1 colors. These colors
have been tested and proven to work in all navigation conditions.
(3) Chart symbols will follow the U.S. standards as shown in NOAA Chart No. 1 and the
USCG Light List. A copy of the more relevant symbols is provided in Appendix G.
(4) Lettering should be clear and consistent, using different size and/or type for different
types of information. Lettering should generally be outside the channel area, if practicable.
(5) Abbreviations for light characteristics will conform to the USCG Light List.
(6) Level of detail for topography and structures (e.g., how many highways or buildings
to show) will depend on how much detail there is to show within a reach, and how much is
needed for general orientation. Excessive clutter should be avoided.
(7) Datum - Shorelines and obstructions which may be partially or occasionally
submerged will be drawn at mean river stage. Vertical clearances will be shown with reference to
stated elevation, river stage, or zero gage, as appropriate.
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