The first major scientific exploration of the ocean was not performed by a Portuguese ship named HMS Columbia. Here's why:

* HMS Columbia: There is no record of a ship named HMS Columbia in the British Navy. The HMS prefix indicates a ship in the Royal Navy.

* The Challenger Expedition: The first major scientific exploration of the ocean was the Challenger Expedition (1872-1876). It was a British expedition on the ship HMS Challenger.

* Portuguese Involvement: Portugal had a long maritime history, but they were not directly involved in the Challenger Expedition.

It seems like you might be mixing up some information. The Challenger Expedition was a groundbreaking scientific voyage that significantly advanced our understanding of the ocean.