I Saw Three Ships (from 4 Christmas Carols). Arranged by Mack Wilberg. For SATB choir (divisi). Advent and Christmas. Mack Wilberg Series. Main Key: F Major. Christmas, Concert and Sacred. Difficulty: Medium Advanced (Jr. High/High School) or Medium (Adult). Octavo. 24 pages. Duration 3 minutes 18 seconds. Published by Hinshaw Music Inc. (HI.HMC923).