SS Great Britain was launched in Bristol on 19 July 1843, in a float-out; at the time she was by far the largest vessel ever built.

The launching, more accurately a float-out, took place on 19 July 1843 in Bristol. The christening had been assigned to Clarissa Miles, and a source records the completed ship as launched by Prince Albert on that date, though the exact sequence relative to the float-out is unclear. When completed in 1845 the vessel measured 322 feet with a 3,400-ton displacement; these figures describe the finished ship rather than necessarily her 1843 launch state. Bristol Harbour is a named locality, not an exact site.

Sources

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.