Historical clue formulations

• ___ deck — 2016-10-01
• Lowest deck of a ship — 2012-06-19
• Lowest deck on a ship — 2011-08-27
• Lowest deck — 2005-08-07
• Fourth deck of a ship — 2003-01-23
• Lowest ship's deck — 2001-03-04
• Lowest deck on a ship — 2000-03-08
• Lowest deck on a ship — 1999-11-03
• Lowest deck — 1999-02-24