His wife, who had been reading in bed, had simply disappeared.
By far the most extraordinary story concerned Linda Morgan, who was sleeping in a starboard side cabin.
With just moments to spare, Calamai ordered a hard left turn in an attempt to outrun the other ship.
The Swedish vessel, under the watch of third officer Johan-Ernst Carstens-Johannsen, spotted the Doria on its own radar a few minutes later.
The Doria safely completed 100 transatlantic crossings between 1953 and 1956, and it initially seemed that its 101st would be no different.
Despite sailing in heavy fog, Captain Calamai had ordered only a minor reduction in speed to stay on schedule for an early morning arrival in New York.