Once the Aircraft and Rowboat steps are resolved, a new turn begins (step 5 of a normal turn). The Aircraft is resolved first and then the Rowboat.
If the Aircraft crashes before the Rowboat, the Rowboat continues alone.
If the Rowboat crashes before the Aircraft (the player discards the «Rowboat» card), another passenger could play a Rowboat card to embark on it.
A new journey will start when both aircrafts have crashed or when all players have decided not to go any further: all players will board the Aircraft again and pick a card.