The orbiter is named after the British HMS Endeavour
, the ship which took Captain James Cook on his first voyage of discovery (1768–1771). This is why the name is spelled in the British English manner, rather than the American English ("Endeavor"). This has caused confusion, most notably when NASA itself misspelled a sign on the launch pad in 2007. The name also honored Endeavour
, the Command Module of Apollo 15, itself also named after Cook's ship.