I hereby declare that the Whale is a Transport, not a freighter.
I had a little chat with Cay about this issue, and we decided that the ship must be a transport because of the cargo capacity and shield generator. The infocard is then wrong, and the ship must be treated as a transport instead of a freighter.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )