Adjust depth curves in Raymarine LightHouse charts – How to get the best chart presentation

Guide to setting depth curves for Hydrographica and the Swedish Maritime Administration – adapted for smaller and larger boats.

Sjöfartsverket and Hydrographica handle depth curves differently, which can sometimes create monochromatic blocks at the transition between zones. This can affect chart clarity. The solution is to adjust the depth curve settings in Raymarine LightHouse charts.

Why does the problem occur?

Differences in coloring between the Swedish Maritime Administration's and Hydrographica's areas can cause the chart to show sharp edges or blocks. By adjusting the settings, you get a smoother and more logical presentation.

How to adjust the depth curves

Go to Settings → LightHouse charts → Depth Curves and select values based on your boat type:

Smaller boats

• Set shallow water to 2 m
• Set deep water to 3 m

Result:

• In Hydrographica areas: dark blue 0–2 m, light blue 2–3 m, then white
• In Swedish Maritime Administration areas: dark blue 0–3 m, then white (no light blue 3–6 m curve)

Larger boats and sailboats

• Set shallow water to 3 m
• Set deep water from 6 m

Result: Everything above 3 m in Hydrographica areas becomes light blue, providing clear marking of the 6 m curve.

NOTE!

With updated charts and the latest software, Hydrographica areas will automatically appear whiter and blend better into the presentation.

Tips for best results

• Ensure you have the latest version of LightHouse OS.
• Test different settings depending on your boat type and navigation needs.