The following are the supported log file formats. The log file formats can be set from your Lowrance or Simrad MFDs.
Below are the settings you need to set from the sonar/echosounder panel menu of your Lowrance or Simrad MFDs.
| Frequency | 200 kHz and/or 455 or 800 kHz (Downscan) |
| Range | Auto (variable depth lakes); 2x max depth (shallow lakes) |
| Surface clarity | OFF |
| Noise rejection | Low |
| Mode | Shallow water (for vegetation detection) |
| Ping speed |
10-20 pings per second Note: Increasing the ping speed will increase resolution but will
also greatly increase the file size. Users should not see a
large difference in outputs with a ping speed of 10
pps.
|
The maximum depth you can get depends on the sonar module output power and the connected transducer. Check the technical specifications of your connected transducer.
The table below shows the tested minimum depth that can demonstrate accurate bottom tracking using the 200 kHz frequency. The signal can usually detect the bottom even in dense vegetation beds, although, extremely dense vegetation canopies can extinguish acoustic signals and periodically give false bottom readings.
| Bathymetry | 1.1 feet (0.33 m) |
| Vegetation detection (default) | 2.4 feet (0.73 m) |
| Composition (default) |
For homogeneous bottoms, users can travel at a relatively high rate of speed and still get very accurate map results. However, excessive speed in areas of complex bottom topography or vegetation may result in a poor-quality map. In complex bottom or shallow vegetated areas speeds should generally not exceed 6 mph.
| Bathymetry | 20 mph |
| Vegetation detection | 10 mph |
| Composition | 10 mph |
For higher accuracy and precision where bottom environments are highly variable, it is recommended to have a slow speed (< 3 mph) and intensify the coverage of bottom areas with complex topography, paying special attention to carefully mapping navigational hazards (e.g., rocks, shallow shoals).
The default plant length detection threshold is 5% of the water depth.
The recommended maximum record length is 1 hour or 500 MB, whichever is reached first. The maximum file size on Lowrance and Simrad devices is 2 GB, after which the recording will automatically stop and not restart.