Historical clue formulations

• Secured by a slip — 2025-06-26
• Tied up, as a ship — 2022-01-20
• In a slip — 2015-10-08
• At anchor — 2014-12-18
• In a slip — 2014-06-27
• Tied up — 2012-05-06
• Tied down, as a boat — 2008-01-28
• Tied fast — 2002-10-08
• Anchored — 2002-09-11
• Fixed firmly — 2002-06-02
• Tied up, in a way — 2001-10-10
• Secured — 1994-11-08