is one piece episode 203 filler?

As the Navy sails through the smoke caused by the explosion that opened the gate, Nami convinces the crew to turn back and recover their treasure. She uses the bells the Navy ships are ringing to detect where they are so the Going Merry can sail around them without crashing.

As the crew gets nearer to the base, Robin reveals that several of the docks have been emptied to navy budget cuts, so they may be able to hide the Merry in an empty dock.