The feature which you are referring to has been titled Plotter Sync by Navionics. As of the LightHouse v3.2.101 release, this feature had not yet been implemented within the LightHouse 3 software. However, many more feature remain to be added to LightHouse 3 and this feature request has been logged accordingly. Please click here to view the FAQs addressing LightHouse 3 software development. In the interim, it is recommended that Navionics (508-291-6000) contacted to determine whether the Navionics boating app may be used to produce a GPX file, as the latter may be copied to a microSD memory card, which may then be imported by the MFD.