The HAPAG liner Amerika (22,622 GRT, 669 feet long) was among the vessels that sent ice warnings to the Titanic. At 11:45 a.m.On the morning of 14th April, Captain Knuth ordered the following message transmitted:
Hydrographic Office Washington D.C.
amerika passed two large icebergs in 41°27 N. 50° 8' W on the 14th of April
Knuth
It appears that this message was never relayed to the bridge.
References
John Booth & Sean Coughlan (1993) Titanic Signals of Disaster. White Star Publicatons, Westbury, Wiltshire. ISBN 0 9518190 1 1