One hour of recording corresponds to about 10MB of data. This recording can be done on any SD card (preloaded BlueChart card or other - up to 8GB accepted). The " manage "menu allows you to duplicate recordings to another SD card or copy recordings from another SD card (GPSMAP only). The Quickdraw Contours data is saved to the remaining free memory space on the SD card. The sounding lines are created in real time as you move through the field. Once the recording is activated, a bathymetric map with depth curves represented every 30 cm is automatically displayed. įrom the navigation map, choose : Menu > Quickdraw Outlines then " Start Recording ". The Quickdraw Contours feature allows you to generate your own bathymetry using any vertical technology probe.
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