@Override
    public void startDefaultNavigation2() {
        if (waypoint == null || waypoint.getCoords() == null) {
            showToast(res.getString(R.string.cache_coordinates_no));
            return;
        }
        NavigationAppFactory.startDefaultNavigationApplication(2, getActivity(), waypoint);
    }
Tries to navigate to the {@link Geocache} of this activity.
main/src/main/java/cgeo/geocaching/WaypointPopupFragment.java