Yes you can test it. Assuming you have a recent Nuvi, do this: From 'Where To? View Map' page, Press Tools>Setting>System>GPS Simulator, and select 'On' then 'OK', 'OK'. Press and hold return arrow to return to original page. Press 'Where To?', Then (for example) press 'Cities', Type (for example) 'San Jose'> Done> select 'San Jose, San Jose' at the list> Set Location. Press and hold the return arrow. Repeat the procedure this time for the city 'Heredia' for example, but this time, press 'Go!'. Press 'Yes' on 'Simulate driving this route?'. You can scroll thru the route by pressing the turn indicator in top LH corner.
Some Nuvis you have to press 'Map', then 'Set Loc' to set the location after making a selection.
Although this is a Spanish map, you will get navigation in English if you have an English voice selected.
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