In One Piece Episode 63, titled " ," the Straw Hat Pirates officially begin their journey into the Grand Line. Key Plot Points

: In a significant moment of foreshadowing, Crocus is seen reflecting on Luffy’s potential, wondering if they are the crew "Roger" had been waiting for—hinting at Crocus's past as the doctor on Gol D. Roger’s ship. Episode Details

: The crew learns from Laboon’s caretaker, Crocus, that standard compasses are useless in the Grand Line due to unpredictable magnetic fields. To navigate, they must use a Log Pose , which records the magnetic signatures of islands.

Rewatched episode 63. Faith in Goda reinforced even further.

: After hearing the tragic backstory of Laboon the whale—who has been waiting 50 years for a pirate crew that never returned—Luffy picks a fight with him. Luffy halts the fight and promises to return one day to finish it, painting the Straw Hat Jolly Roger on Laboon's head as a sign of their "rematch promise" to stop the whale from harming himself by ramming the Red Line.