If a Spacecraft is here at TURN-END (not ROUND-END) the Spacecraft executes the AUTOMATIC MANEUOVER (exclamation point character in red droplet). The Spacecraft will return from here (Sub-orbital space) to the Earth's surface with Landing advancement optional (parenthesis means optional). (Landing advancement symbol is the three-legged, one-eyed bug)
The Re-Entry advancement is not needed here (White cloud symbol) because the symbol is not present on the Sub-Orbital card.
If a Human passes through the sub-orbital card (up to Space or returning to Earth)(flying directly from Earth to Earth Orbit is included), this Human initiates the Sub-Orbital exploration.... simply turn the card over. The human will immediately be subjected to the conditions on the card (usually a dice roll to see if the Astronaut is incapacitated). Each human to pass through this card will immediately be subjected to the condition statement on the card - till game end, doesn't change). To be clear - the Sub-Orbital card gets turned over ONCE per game.
Incapacitated Astronauts on Earth are healed for free. Incapacitated Astronauts anywhere else die if not healed (see doctor astronaut).