Why weren't the Officers, and the Captain aware of ice-warnings in the North Atlantic? Well the fact of the matter is they were aware, very aware!
I'll make it to where you can choose for yourself, I'll put the all of the ice-warnings that the Titanic received on the 14th of April.
1. At 9:00am the Titanic received an ice-warning from the Caronia, the message was delivered to the bridge at Captain's request, for other officers to take note.
'Captain, Titanic west bound report bergs, growlers and Field ice in 42*N, from 49* to 51*W, compliments, Barr'
2. At 1:42pm the Titanic received an ice-warning from the Baltic, the message was delivered to Captain Smith, and he talked about it with Ismay. Ismay then put the ice-warning in his pocket and later showed it to other passengers, then the Captain asked for the return of the warning, and he posted it in the chart room at 7:15!
'Greek steamer Athenia reports passing icebergs and large quantities of field ice today in latitude 41*51* N, longitude 49*52* W wish you and Titanic all success. Commander'
3. At 1:45pm the Titanic received an ice-warning from the Amerika, this was really a private message over heard by the wireless operators, and never made its way to the bridge.
'Amerika passed two large icebergs in 41*27* N, 50*8* W on April 14.'
4. At 7:30pm the Titanic received an ice-warning from the Californian, this message was also over heard by the wireless operators and was delivered personally to the bridge by one of the wireless operators Harold Bride. Captain Smith was not made aware of this ice-warning, he was dining in the La Carte resturant with the Wideners.
'To Captain, Antillian latitude 42*3* N, longitude 49*9* W, three large bergs five miles to the southward of us. Regards Lord'
5. At 9:40pm the Titanic received an ice-warning from the Mesaba, this message never reached the bridge. Harold was taking a much needed rest, and Phillips was too busy sending commercial traffic to Cape Race.
'From Mesaba to Titanic. In latitude 42* N, to 41*25* W, to longitude 52*30* W, saw much heavy pack ice and great number large icebergs, also field ice, weather good, clear.'
6. Around 11:00pm the Titanic received an ice-warning again from the Californian, this liner was only 10 miles away from the Titanic. As Phillips was busily sending private messages the Californian was going to tell Titanic that she was stopped for the night because of field ice, but when he started transmitting he was so close that it burst into the already stressed ears of Jack Phillips, He did not wait for the warning to come through before he replied angrily "shut up, shut up, I am busy I am working Cape Race." The Californian operator felt rejected and shut down his radio and went to bed.
So, I leave you to judge for yourself!
But I'll give you my opinion. I really don't think that these were regarded as they should have been. But I have to remember that I know the end of the story, and the wireless operators, officers, and Captain didn't. How were they to know that these ice-warnings were critical to the situation. Part of the reason that they were not taken note of like they should have been, is because the radio broke down that morning, and the operators were under stress, tired, and probably a bit cranky.
The Titanic was warned six times about danger to come!!!