Historical clue formulations

• Spar on a sailing boat — 2026-01-21
• Pole that extends a sail — 2024-02-21
• Pole used for extending a sail — 2024-02-17
• Mast extension — 2019-01-18
• Sail extender — 2018-12-14
• Diagonal sail support — 2018-08-03
• Nautical pole — 2015-11-03
• Sail extender — 2013-11-03
• Sail extender — 2009-11-29
• Diagonally set spar — 2009-07-24
• Sail extender — 2005-11-11
• Diagonal spar — 2004-10-27
• Nautical pole — 2003-01-18
• Nautical pole — 2000-04-02
• Sail extender — 1997-12-31
• Sail spar — 1997-08-27
• Diagonal spar — 1994-07-09
• Pole at sea — 1994-05-04