David Blair (or Davy) (11 November 1874 – 10 January 1955) was a British merchant seaman with the White Star Line, which had reassigned him from the RMS Titanic just before its maiden voyage.

Due to his hasty departure, he accidentally kept a key to a storage locker believed to contain the binoculars intended for use by the crow's nest lookout.

[7] Blair was First Officer on the SS Majestic in 1913 when a coaler jumped overboard; the night before, a fellow crew member had succeeded in drowning himself.

Though the boat reached the man first, Blair was commended for his action in The New York Times and received money from the passengers[10] and a medal from the Royal Humane Society.

Blair died on 10 January 1955 in Hendon, Middlesex, and was survived by his son, Donald, a school teacher and author of Lake District hiking books.