{
  "title": "Dead reckoning: registry card",
  "description": "Registry card values for the dead reckoning entry, with the source of each value.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "From the Surviving Record",
  "page": "https://fromthesurvivingrecord.com/shipwrecks/dead-reckoning/",
  "derived_from": [
    "Sources named in the source column of each row"
  ],
  "method": "Compiled by From the Surviving Record from the data listed",
  "data_credit": [
    "Nathaniel Bowditch, The New American Practical Navigator (Newburyport, 1802), retrieved 2026-11-01, public domain",
    "W. H. Smyth, The Sailor's Word-Book, revised by E. Belcher (London, 1867), retrieved 2026-11-01, public domain"
  ]
}