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Geonavigator

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Posts posted by Geonavigator

  1. The MAP76S does double duty for me. I use it for near shore navigation and inland(BlueChart and Topo). The tide tables, and sun & moon data are very useful. The compass is used when stationary or moving slowly. The external antenna(27C)is an avantage on the road or under a dense forest canopy. When the antenna is in use the GPS can be carried in a pocket. The 76S has many navigation data display options. Try TVNAV.COM for a good price.

  2. Magnetic declination is the angular difference between the Magnetic North Pole and the True North Pole. To convert Magnetic direction to True direction ADD West declination to the magnetic compass heading, for East declination subtract declination from the magnetic compass heading. Do the opposite to convert True direction to Magnetic direction.

    Deviation is error within the compass that can be measured and a correction can be applied.

    Many types of hand-held compasses have a built in correction scale permitting the compass direction to give TRUE direction instead of MAGNETIC direction for convenience in using maps or charts that are True North-up. As a rule use True direction on maps and charts.

  3. I have a piece of cloth on the base of an antenna that I pin to the back of my collar. The antenna wire passes under my coat to the 76S in my pocket. The antenna wire cannot become tangled in the brush. The antenna amplifies signal strength producing increased accuracy under a dense forest canopy. Detach antenna from the coat collar and mount it to your car top using the magnetic base.

  4. I've been using the "76S" for the past five months with MapSource Topo and BlueChart. I also use Maptech Terrain Navigator and Chart Navigator on my PC interfaced with the Map76S. When on the road or under a dense forest canopy an external antenna is attached. The EPE is usually less than 20 feet without signal loss. The unit fits perfectly in my pocket. I can operate the "76S" held in either hand. This GPS will support most any navigation need with an array of user options. I have no need for highway directions. I've navigated through the forest, intracoastal and offshore waters day and night without a problem. Garmin has provided timely product support when requested.

  5. I've been using the "76S" for the past five months with MapSource Topo and BlueChart. I also use Maptech Terrain Navigator and Chart Navigator on my PC interfaced with the Map76S. When on the road or under a dense forest canopy an external antenna is attached. The EPE is usually less than 20 feet without signal loss. The unit fits perfectly in my pocket. I can operate the "76S" held in either hand. This GPS will support most any navigation need with an array of user options. I have no need for highway directions. I've navigated through the forest, intracoastal and offshore waters day and night without a problem. Garmin has provided timely product support when requested.

  6. Inorder to have multiple maps in the 76S download different MapSource maps at the same time. If you download separately one map will erace the other. I'm currently using BlueChart and United States Topo in the Garmin 76S that were downloaded together. The maps cannot be used concurrently. The user must select the map to display.

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