 It is also mentioned that, because SOS had been adopted in 1908 (although not widely used by this time), it might have been expected to hear that in a true emergency.Finally, because it had been widely vaunted that "Titanic" was unsinkable, it could have been reasoned that whatever danger the ship was in could not be critical.Unable to convince Dean quickly enough, Cottam rushed down the ladder to the captain's cabin and awakened Rostron.