The Last Voyage (1960) on Netflix

The SS Claridon, an ocean liner, is on its fifth to last voyage, this time en route to Japan across the Pacific, before it is decommissioned and sent to the scrap yard. Among the passengers is the Henderson family - husband and wife Cliff and Laurie Henderson and their adolescent daughter Jill - who are moving to Japan for Cliff's job. The passengers are generally unaware that a fire has simultaneously broken out in the engine room and one of the currently unused dining rooms. The crew is able to contain the fires without needing to inform the passengers. But the crew eventually learns that the fires were the result of malfunctioning aged equipment. As they rush to fix what they now know is a ticking time bomb with the equipment, they are too late as while they are mid-ocean, an explosion occurs in the boiler room, causing a massive hole to be ripped out mid-ship, including through the Henderson's cabin. Captain Robert Adams, who seems to be working toward his own agenda, has to decide what to do, he getting conflicting advice from his officers and crew. The problems for him are surveying and dealing with the damage, assessing and dealing with what potential damage may still occur - the main initial problem seeming to be that one of the bulk heads may burst, which may cause the ship to sink if it does - not causing mass hysteria among the passengers, and if they do decide to abandon ship, weighing the dangers involved doing it mid-ocean. All the while, Cliff has to get both Laurie and Jill out of precarious situations with little help from other passengers or crew, he too who may have to make some difficult life and death decisions for himself and his family.