Translational lift -
http://cybercom.net/~copters/aero/translational.html
Just to add to that - ever notice why there is no vibration when it happens when you are out of ground effect?
When in ground effect you are flying through your own downwash which you are pushing in front of you. This is an "indicator" that you have achieved translation.
Transverse flow -
http://www.aviationtrainer.com/Trans...low_Effect.htm