You don't get one. When the thief escapes after the scooter chase, pick up the keycard he drops, and go back to the museum.
There is no key for a boat chase. The good ship Ribica is docked for the entire game.
you get in the boat and sink
When the strange man jumps in the boat he will drop it
The boat Ribica is at the Docks on Counterfeit island. There is a torn pocture piece on the top of the mast.
The Black Widow key card is dropped by the art thief (shady guy) when he makes his escape by boat.
When you chase him through the streets, he jumps into a boat at the dock and drops his key card. Then you can get it.
If your talking about Counterfeit Island then you get the key and go back to the museum on Counterfeit Island
poptropicia
You don't ever even use the boat.
Early Poptropica.
You use it.
The key fits the Inspector's cottage in the Countryside.
In the supply room