I think one of the reasons Californian didn't come to Titanic's aid,
was because they saw white flares. Now I'm not completely sure
what white flares mean,but red flares mean 'Distress'. Plus the
radio operator aboard Californian had gone to bed around the
time Harold Bride was calling for help.Therefore, Californian
would not have known what was going on. Yes,they were the closest ship within Titanic's position,but They probably weren't
aware of the situation. How Ironic.