Official county waypoints were overlaid on the plot and the reef deployment data was correlated to nearest detected targets. How the Plots Were Created The collected position and depth data is then adjusted for tides, interpolated to fill in uncollected data and analyzed to determine the bottom contours. When structures were detected, additional close-in scanning was performed to enhance detail. Official county waypoints were used as a starting point and the entire area was scanned. For example, more than 25,000 samples were collected for just one area reef. All contour charts are created from sonar data while slowly trolling in a mowing the lawn pattern directly over each reef or wreck. How the Data Was Collected Three boats were used in the collection of hundreds of thousands of sonar data points with the corresponding WAAS GPS Latitude and Longitude from each reef. The places to fish and dive are obvious on the charts and extremely accurate. Fisherman will love putting the hook right on the structure and in the fish s mouth. Scuba divers will love the ability to see the height and position of the structures and drop anchor, right down the hatch. Typically the closer the contour lines are the sharper the increase or decrease in depth which may indicate a wreck, ledge or reef which attract fish and the greater likelihood you will catch one. The Garmin Quickdraw Contour maps show depth from the surface and contain depth contour lines in one foot increments. About Contour Maps The contour maps we produce are a birds-eye (overhead, looking directly down) view of ocean topography (bottom contours or bathometry). So in an effort to eliminate the wasted time and gas driving around looking for dive and fishing sites, we developed a method to visualize the bottom and provide an extremely accurate map of the bottom structures. So when a deployment was made, the correct location typically was inaccurately recorded. Also the tug boat, barge and crane offset distances contributed to the inaccuracies. However, for many years the location of the deployment was recorded using Loran and GPS system where the accuracy was intentionally being decreased for national security. 1Ģ INTRODUCTION Over the years the State and County have been putting down concrete, steel and other material to form artificial reefs where fish can gather and populate.
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#Garmin homeport tutorial how to
1 Garmin QDC Contour Maps User Manual Contains detailed instructions on how to use your custom Garmin QDC Quickdraw contour maps 2017 CSS Inc.
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