Vista also comes preloaded with marine navigation aids. The Vista's basemap contains lakes, rivers, cities, interstates, national and state highways, railroads and coastlines. In fact, when you turn on WAAS, you can increase the accuracy of Vista's position reporting to within three meters. The Vista can also receive position corrections from the Wide Area Augmentation System (WAAS), which makes Vista's already-accurate positioning data even more reliable. The Vista's barometric altimeter pinpoints your precise altitude, and its built-in electronic compass provides bearing information even while you're standing still. The Datasheet can be retrieved by clicking on the PID in the list.The eTrex Vista combines the popular features of the eTrex Summit with a full basemap of the Americas, the Atlantic or the Pacific, a barometric altimeter, electronic compass and 24 megabytes (MB) of internal memory for extra data storage.
By viewing the Mark List you can view and sort the attributes of the markers. Ellip Ht – The Ellipsoid Height of the mark if it has been GPSed. Ortho Ht – The Orthometric Height (Elevation) of the mark. HOrder – The Horizontal Order of the mark. Pos Source – Lists the source of the position. V Order – The Vertical Order of the bench mark. Elev Source – Lists the source of the elevation. Control Type – The type of control the mark is plotted on the map **Read the Symbology section of Help for more information. PID – The PID of the mark with a hyperlink to the Datasheet. The following attributes are listed for each mark. To view information about a control mark click on the marker on the map. By clicking on the PIDs listed you can view the Datasheet. You can sort the mark list by any attribute when clicking on the headers of the table. Click on the View List button at the top of the menu to the left. To view the Mark List there must be marks plotted on the map. 
Select all of the types of marks to plot on the map.
Click on the Map Layers section on the menu to the left. You can change the radius used to plot marks under the Map Layers (15 mile max in Internet Explorer, 30 mile max other browsers). Right click on the map in your area of interest and select 'Place X'. Use the Go To Location on the menu to the left to zoom into the region and plot marks.
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