Depth Gradient; Navionics Depth Contours; Deep Water Color - Raymarine LIGHTHOUSE 3 Advanced Operation Instructions

Shallow contour, Safety contour and Deep contour values can be customized from the Depths
settings menu: Menu > Settings > Depths .

Depth gradient

By default the color gradient used for depth contours is Dark to Light as described in the example
above. If required the Depth gradient change be changed to Light to Dark which will invert the
colors so that white I used for the Shallow contour and the darkest shade of blue is used for depths
deeper then the Deep contour value.
The Depth gradient can be changed from the Depths settings menu: Menu > Settings > Depths .
Note:
Charts from different cartography vendors will handle depth contours differently.

Navionics depth contours

When using Navionics® charts depth contours are automatically colored using a blue color gradient
with the shallowest contour using the darkest shade and the deepest using white.
Example Navionics® Charts Depth contours
1. Shallow area — When the Shallow area feature is enabled all depths from zero to the depth
specified in the Zero to: setting will use red cross hatching to identify shallow areas.
2. Depth contour — All depth contours are identified using a line and a blue color fill gradient.
3. Deep contour — All depths deeper than the depth specified in the Deep contour: setting is
colored white by default.

Deep water color

The color used for the Deep contour can be set to either white or blue. When set to blue the Deep
water contour will use the lightest shade of blue.
The depth contour settings can be accessed form the Depths settings menu: Menu > Settings
> Depths .
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