Another commenter mentioned the un-likelihood of a whaler captain taking his bride on a projected three-year voyage.
In fact, sailors, a generally superstitious lot, often found women on a ship to be a jinx.
Then, too, today the very act of whaling is so P non-C that a lot of people will object to that aspect, rather than concentrating on the fact the story is set at a time no one saw a particular problem with killing the sea-going mammals for their oil.
Robert Taylor gives one of his best performances; Stewart Granger comes across very well.
Ann Blyth has some good scenes, and some bad ones, but she does them all well.
One really attractive aspect of "All the Brothers" is a superb supporting cast. Peter Whitney, for example, has one of his best roles in a very long career. He too often plays a dumb or bumbling character, but here he is a strong person in a pivotal position.
Leo Gordon has a smaller role, but he stands out, as does John Lupton, in a larger part.
Frank DeKova (whom I met on the set of "Johnny Firecloud") was a superb character actor but who was too often relegated to small roles. He could have been a bigger star, with his talent, but he was recognized by his peers, anyway.
The great Glenn Strange and the great John Doucette were aboard, adding their enormous talents and, as so often true in Hollywood, not getting screen credit.
Come to think of it, this movie is worth watching just for the great cast. But be prepared to suspend your disbelief, and don't look at the blue eyes of the "native girl."