If you've started night navs and you don't know the answer to that question, I'd be looking for a new instructor / school. If you go delving into the AIP you'll find the answer - in short your primary means of navigating is always DR, supported by various aids. eg map reading, ground based nav aids and GPS. From memory Night VFR requires the destination to be equipped with a serviceable navaid you're trained on and the aircraft equipped with or if it hasn't then you need an alternate so equipped within a specified distance or flight time.... I think it says something like that? Good luck!