Fire Down Below: A Safety Culture
We can tell by the attitude of the investigator, Jan Henderson, that he believes that something is not quite right. The Captain and the crew sense this, and become worried and resentful.
After his investigations are completed, Henderson makes his report to the owners of the vessel. It is there that we learn that, although this film seems to be about a fire on board ship, it is, in fact, about a much bigger subject.