 As the night wore on, the exhausted, freezing, and soaking wet men aboard the overturned Collapsible "B" found it almost impossible to remain on the slick keel.Gracie later wrote that over half the men who had originally reached the collapsible either died from exhaustion or cold and slipped off the upturned keel during the night.As dawn broke and it became possible for those in other lifeboats to see them, Second Officer Lightoller (who was also on the collapsible, along with Wireless Operator Harold Bride) used his officer's whistle to attract the other boats' attention; eventually lifeboats Nos.