Historical clue formulations

• Transport from Seattle to Bainbridge Island — 2021-05-26
• Commuter boat — 2021-01-18
• Step 1: A passenger ship since 1817 — 2017-11-02
• Charon's craft — 2016-07-06
• See 105-Across — 2016-04-10
• Transport, as across a river — 2011-10-02
• Boat to Staten Island — 2002-07-03