Depth Contours; Example Lighthouse Charts Depth Contours - Raymarine LIGHTHOUSE 3 Advanced Operation Instructions

Depth contours

Depth contours, also known as bathymetric contours or depth curves are lines drawn on cartography
that connect points of equal depth creating a visualization of underwater bottom structure. Contours
use color fills to indicate depth in relation to other contours.
Raster charts
On Raster charts Depth contours are fixed and are always displayed.
Vector charts
On Vector charts Depth contours can be customized from the Depths settings menu: Menu >
Settings > Depths > Show contours..
Depth contours include Depth soundings. The Depth contour soundings are differentiated from
other Depth soundings by using a white outline.
The following Depth contour options are available:
• None — No Depth contour lines or depth contour soundings are displayed.
• Manual — Depth contours are only shown from zero to the depth specified in the Zero to: option.
• All — All Depth contours are displayed.
Note:
The Depth contours option does not effect the contour fill color.
Example LightHouse™ Charts Depth contours
1. Shallow contour — Depths from zero to the depth specified in the Shallow contour setting will
be within the Shallow contour, by default the Shallow contour uses the darkest shade of blue.
2. Safety contour — Depths from the Shallow contour to the depth specified in the Safety contour
setting will be within the Safety contour. The Safety contour uses a thicker line than other
contour lines and is colored using a medium shade of blue.
Important: The Safety contour should be set to the same value as your vessel's Minimum safe
depth and should be used to identify areas where you should not take your vessel.
The Safety contour should be set to the same value as your vessel's Minimum safe
depth and should be used to identify areas where you should not take your vessel.
3. Depth contour — All Depth contours consist of a line and depth soundings that appear along
the line.
4. Deep contour — Depths from the Safety contour to the depth specified in the Deep contour
setting will be within the Deep contour, by default the Deep contour uses the lightest shade of
blue. By default depths greater than the Deep contour will be colored white.
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