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depths
Depth Contours
| NOS/NIMA |
|
IHO/Foreign NIMA Charts |
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Low water line
One or two lighter blue tints may be used instead of the "ribbons"
of tint at 10 or 20 m |
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Approximate depth
contours |
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Note: The extent of the blue tint varies with the scale and purpose
of the chart or its sources. On some charts, contours and figures
are printed in blue. |
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