NavService" is likely a misspelling of "NaveService." Unfortunately, there is not enough information provided to accurately determine what NaveService is or what it does.
A utility that enables users to enjoy the SugarSync service.
Easy set-up software that enables Mac OS X's Mail, iChat, Address Book
Determine the service plan, device type or MAC ID of your Mobile Device
NavService" is likely a misspelling of "NaveService." Unfortunately, there is not enough information provided to accurately determine what NaveService is or what it does.