Forbidden Desert

You may take up to 4 actions each turn (you can take 0–4), and moving to an adjacent, unblocked tile costs 1 action per move (no diagonal moves) (p3).

Yes — picking up a revealed Flying Machine part costs 1 action and the part must be on an unblocked, excavated tile; if the part is on an unexcavated tile you must excavate it first (p3, p4).

No — a tile with 2 or more Sand markers is considered blocked/impassable and you may not move onto or through it (p3; see sand stacking on p6).

If your pawn is on a tile with 2+ Sand markers you are buried and must have Sand removed down to one or none before you can take any further actions; teammates may spend actions to dig you out (p6).

After you take actions, draw Sand Storm cards equal to the current Sand Storm level; Wind Blows cards shift the indicated number of tiles into the storm hole (moving any pawns, markers, and parts with the tiles) and then place one Sand marker on each tile that moved (p5).

No — players on the same tile may share water and pass equipment cards for free at any time, though you may never exceed your canteen's maximum; note Sun Beats Down storm cards force drinking if you're not in a tunnel or protected (p3, p6).