Capstan
Associated Wreck / Site: Kinghorn – St. Lawrence River
Location: Top Deck
Date documented: 2001 & 2003
Photographer / Surveyor: Tom Rutledge – SLD


Description & Context
Picture the foredeck of a late-1800s Great Lakes steamer or big schooner: weathered planks slick with spray, heavy bitts and chocks up forward, and—bolted through the deck beams—a stout, waist-high iron capstan. It’s essentially a thick, spool-shaped drum (often cast iron or steel) designed so wet lines don’t slip as they wrap around it.
On an 1880s–1890s working boat, you’d commonly see two “flavors”:
- Manual capstan (older / simpler): a vertical drum with holes for capstan bars. Crewmen “ship” the bars, lean in, and walk it around in a slow circle. Every step loads the line tighter; every pause is held by the mechanism so it doesn’t run back.
- Powered capstan (increasingly common by late 1800s on steamers): the same visible drum above deck, but driven by machinery below—so the capstan turns with a deep, steady pull rather than pure muscle. (On many ships, the capstan function is integrated with the anchor windlass/capstan head setup up forward.)
What it does on a Great Lakes ship: it’s the “deck muscle” for heavy mooring lines and warping—snugging the ship along a dock, hauling a line in against wind/current, or helping handle ground tackle operations when fitted as part of the windlass system.


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