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Archives of the Royal Navy officers logs seems to date back the 1660s. http://www.nationalarchives.gov.uk/help-with-your-research/research-guides/royal-navy-sh

• theoh 9y ago
  This is interesting too. A less detailed class of records, but older. http://www.medievalandtudorships.org/database/ http://www.medievalandtudorships.org/database/
• HarryHirsch 9y ago
  The archives of the Spanish Archive of the Indies are a century older than that, and if the Portuguese Casa da Índia hadn't been destroyed in the great 1755 earthquake we'd have sailing records from the dawn of the Age of Discoveries. The records and maps were national secrets, and for good reason. You do wonder if the NSA will declassify its records 100 years from now.
  • mbroncano 9y ago
    They have even older documents in Simancas https://en.m.wikipedia.org/wiki/Archivo_General_de_Simancas https://en.m.wikipedia.org/wiki/Archivo_General_de_Simancas