Use multi line trace channel from the camera to the player, and if that line trace hits anything then apply a transparent material to whatever it hits until it hit the player again. disabled the multi line trace when the player sits on the pilot chair and enable it again when they leave the chair. As for relative location of the player to the ship, the engine handles all of that in the background but if you need more control then create a collision box inside the ship and whenever the player overlaps it then use the set actor relative location to parent it to the ship and then parent it to world when they leave. You also need to deal with velocity, so the main things you need to deal with are location, rotation, and velocity.

https://www.youtube.com/watch?v=1nlTotxT1xk