You didn't see any TA on french SSBN or SSN for one good reason, they are deployed / retrieved by a specialized ship called "Caudataires" when the sub leave or come back to l'ile Longue (base of the french SNLE) or Toulon (base of the SSN).
There is 2 of this specialized ship in service the Phaéton (Y 656) and Machaon (Y 657)
The system TA called ETBF in french is made by ECA group. Here what they look like.
A new system exist (there is not known photo just a drawing) it should equip the SSBN (retrofit) and new SSN (Suffren class)
