Additional minor features may be applied to an existing aerodynamic surface such as the main wing:
All aircraft utilize aerodynamic surfaces in order to generate lift.
Secondly, the classical aerodynamic surface has little actuation for the case.
The vehicle is in constant contact with the water, therefore the aerodynamic surfaces operate in ground effect.
Parachuting is essentially falling but with an aerodynamic braking surface.
The aerodynamic surface may also allow a small amount of forward motion, but a parachute always falls faster than it can travel forwards.
For example, ergonomic and aerodynamic contoured surfaces were extremely difficult to define on engineering drawings.
At that altitude, the air is so thin that aerodynamic surfaces have almost no effect.
In particular, electrohydrodynamic coupling can be used to accelerate air flow near an aerodynamic surface.
By contrast, grid fins are a lattice of smaller aerodynamic surfaces arranged within a box.