is one piece episode 144 filler?

The Straw Hat Pirates notice some debris falling from the sky, initially thinking it was rain. Suddenly, an entire wrecked ship falls from the sky causing huge waves rocking the Going Merry after almost hitting it.

When the seas have calmed down the Crew tries to figure out how a ship could fall from the sky. Nami then notices that her log pose is pointing towards the sky, thinking that it is broken.

Robin suggests that the log pose isn't broken but is merely registering an island with strong magnetic pull further suggesting that it must be pointing towards Sky Island.