On 14 April 1912, "Titanic" radio operators received six messages from other ships warning of drifting ice, which passengers on "Titanic" had begun to notice during the afternoon. The ice conditions in the North Atlantic were the worst for any April in the previous 50 years (which was the reason why the lookouts were unaware that they were about to steam into a line of drifting ice several miles wide and many miles long). Not all of these messages were relayed by the radio operators. At the time, all wireless operators on ocean liners were employees of the Marconi's Wireless Telegraph Company and not members of their ship's crew; their primary responsibility was to send messages for the passengers, with weather reports as a secondary concern.