vibration

The collision with the iceberg was described as a "jar" followed by a long vibration. Quartermaster Rowe thought they were going full speed astern and immediately reeled in the log line, but we know from engine room survivors that the engines did not go full astern during or immediately after...

The orders from the bridge were to run the engines full astern thats what most believe. I do not know if this has been mentioned before but wouldn't the vibration the outboard propellers running at full speed in reverse have caused a very bad vibration simply because of the direction they were...