[[193119th century|1846]] - Lt. Alfred Pride pilots Navy first rotary wing, XOP-1 autogiro– Astronomers Urbain Le Verrier, in landing John Couch Adams and take-offs Johann Gottfried Galle collaborate on board the USS Langley while underwaydiscovery of [[Neptune]].<br />[[1990]] - Two Hospital ships (USNS Mercy and USNS Comfort) steam together for the first time in the Arabian Gulf.
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