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  1. How do I display the GPS Course Over Ground (COG) using Maretron’s DSM150 or DSM250 display? You display the GPS100 Course Over Ground (COG) information on a DSM150, DSM200, or DSM250 in the following way:Enter menu mode, scroll to "Favorite Screen Setup..." and press < Enter >Scroll to the favorite screen where you would like to view the CO... Read More
  2. Why is the GPS100 Course Over Ground (COG) erratic at low speeds? The GPS100 computes Course Over Ground (COG) by observing prior fixes or positions and extrapolating the direction of travel from those fixes. If the vessel is not moving, then the GPS100 can not extrapolate the direction of travel and the readings b... Read More
  3. How do I display the GPS100 Speed Over Ground (SOG) using Maretron’s DSM150, DSM200, or DSM250 display? You display the GPS100 Speed Over Ground (SOG) information on a DSM150, DSM200, or DSM250 in the following way.Enter menu mode, scroll to "Favorite Screen Setup..." and press < Enter >Scroll to the favorite screen where you would like to view the SOG... Read More
  4. Why is the GPS100 Speed Over Ground (SOG) reading different from the Speed Through Water (STW) reading? Speed Over the Ground (SOG) is the speed of the vessel relative to the surface of the earth. Speed Through Water (STW) is the speed of the vessel relative to the water. It is possible for the STW to be zero while the SOG is 5 knots, for example if th... Read More
  5. Why is the DST110 Speed Through Water (STW) reading different from the Speed Over Ground (SOG) reading? Speed Over the Ground (SOG) is the speed of the vessel relative to the surface of the earth. Speed Through Water (STW) is the speed of the vessel relative to the water. It is possible for the STW to be zero while the SOG is 5 knots, for example if th... Read More
  6. Which Maretron products are required for me to display true wind referenced to ground speed? In order to display true wind referenced to ground speed you will need a WSO100, a GPS200, a SSC200, and a display capable of computing true wind referenced to ground speed. The WSO100 measures the apparent wind while the GPS200 provides Speed Over G... Read More
  7. What is ground wind? Ground wind is the speed and direction of the wind referenced to a compass rose, which is different from apparent and true wind which are referenced to the bow of the boat. The apparent and true wind are interesting to see how the wind is affecting o... Read More
  8. What is the difference between true wind referenced to ground speed and true wind referenced to water speed? True wind is computed by subtracting the vessel speed from the apparent wind. The vessel speed is either referenced to the water (Speed Through Water (STW)) or the vessel speed is referenced to the ground (Speed Over Ground (SOG)). If the STW is subt... Read More
  9. Which Maretron products are necessary in order to display ground wind? Several Maretron products are necessary in order to display ground wind. You will need a SSC200 compass, WSO100, and a GPS200.... Read More
  10. How do I display the WSO100 true wind referenced to ground speed on Maretron’s DSM150, DSM200, or DSM250 display? You display the WSO100 true wind on a DSM150, DSM200, or DSM250 in the following way:Enter menu mode, scroll to "Favorite Screen Setup..." and pressĀ < Enter >Scroll to the favorite screen where you would like to view the true wind and pressĀ < Enter >... Read More
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