Raymarine LIGHTHOUSE 3, Advanced Operation Instructions

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3. Distance above the bottom face of your depth transducer to the waterline.
Setting up and creating RealBathy contours
Important:
• You will need to know the distance above the bottom face of your transducer to the waterline.
• For tidal environments, ensure you have LightHouse™ NC2 cartography that includes tide station
information for your location.
From the chart app.
1. Insert your LightHouse™ NC2 chart card into the display’s card reader.
2. Select your LightHouse™ chart card as your cartography for the chart app.
For details on choosing your cartography refer to: Selecting Selecting
Selecting a
a
a chart
chart
chart card
card
card
3. Enter the distance above the bottom face of your transducer to the waterline in the Waterline
to tdcr: setting field.
4. Enable the RealBathy toggle switch, located in the Depths menu: Menu > Depths
5. Select the relevant Height correction option:
• None — No corrections are made.
• Tidal — Uses nearby tide station data to correct height. When Tidal is selected a tidal station
search is performed and a list of available stations is displayed. Select the closest tide station
to your location.
• Lake level — User specified value using the water level marker for your location.
Note:
To ensure accurate contour depths it is recommended that:
• in tidal environments (for example, seas and oceans) you use LightHouse™ NC2 cartography that
includes tide station information and select the tide station closest to your location;
• in fresh water environments (for example, lakes), select Lake level in the Height correction: field
and then enter the current reading from the water level marker for your location into the field
located under the height correction option.
6. Adjust the Visibility: setting to the desired transparency.
100% provides full visibility of the RealBathy contours; as the percentage decreases the chart
detail behind the RealBathy contours becomes more visible.
7. Select the required Density: setting.
Steep drop-offs can result in overlapping contour lines; lowering the density in these situations
provides a clearer view.
8.10 Find nearest
The Find nearest feature allows you to select a target or location and search for nearby objects
or places.
Note:
• The level of detail available on charts is dependent on vendor, chart type, subscription level
and geographic region. Prior to purchasing charts check the vendor’s website to establish what
level of detail is available on the charts you want to purchase.
• The information relating to available chart detail and settings in this manual should be treated as
guidance only as it is subject to change that is not under Raymarine’s control.
When an object is selected, the Nearby objects option is available from the object context menu.
Chart app
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