'The Seafarers' was a half hour documentary made for the Seafarers International Union in 1953. It's actually more of a promotional film than a documentary, urging sailors to join the union & extolling the benefits, etc etc. The 1950s equivalent of a corporate video or an infomercial.
There is absolutely nothing remarkable about this film. It's competently made, but it's not the sort of project where a director would have the opportunity to exercise any sort of creativity. Kubrick was a hired gun on this, he did the job he was paid for & that's it.
Any attempts to look for trademark Kubrick touches or innovation would be pointless.
There are only two things noteworthy about 'The Seafarers' - it was directed by Stanley Kubrick, and it happened to be his first film in colour. Other than the title reading 'Directed by Stanley Kubrick', I found nothing of any interest whatsoever. There's nothing wrong with it, but it would be utterly forgotten & ignored if it had not been directed by someone who went on to much greater things.
Darth Nub