deeper START, Manual

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Issues with GPS and Bathymetric mapping
GPS is an essential component for creating accurate bathymetric maps. GPS accuracy and reception quality can be
affected by the conditions.
Heavy, cloudy weather can affect the strength of the signal, while branches, pylons and other obstacles like
electricity lines can also affect connectivity, as can the availability of satellites.
These factors can cause the following issues:
Your Deeper failing to connect with satellites – the satellite icon is flashing red or orange
Your bathymetric mapping (depth colors) appear to be drawn on land, instead of on water
Bathymetry is not drawn on the map when Boat mode or On-shore GPS mode is enabled
GPS/Bathymetry issues in Boat mode
When Boat mode is enabled, the Deeper app uses your smartphone GPS for the bathymetric mapping. The internal
GPS of your Deeper is not being used. Following issues may happen during the mapping process in Boat mode:
Bathymetry is not drawn – GPS connection of your smartphone is not accurate enough for precise bathymetric
mapping. You will see sonar data appear on the right side of the screen, but bathymetry will not be drawn on the
left side of the screen (map).
Bathymetry is drawn on land instead of water – this could be caused by 3 factors:
1. GPS of your smartphone obtains incorrect coordinates. Generally it is a result of poor weather conditions or
overhead obstacles, but if the issue constantly persists in multiple locations on different days - it could also
mean that the GPS of your smartphone is simply not powerful enough to obtain a precise connection.
2. Bathymetry visualization algorithm error. When bathymetry is created using Boat mode, special algorithms
help to expand the coverage of the bathymetry, so that it would fill the missing gaps that were not
physically scanned by your sonar. This helps to create a full map of the lake faster, and also enhances the
end result. However, such algorithms can make an error and result in bathymetry to appear on land. You can
disable these algorithms when viewing your maps on the web version of Fish Deeper by selecting
Detailed bathymetry in the Bathymetry display options:
3. Maps themselves are not 100% accurate. While the Deeper app obtains correct coordinates for mapping, the
map of the location (base map) may not be entirely accurate. Map providers constantly update their maps to be
more accurate, and every time the maps are updated – FishDeeper will have its map updated automatically as well.