Navy Ships and Logs

Supporting guides

• What Is a Ship's Log?
  A ship's log is the official daily record of a ship, covering position, weather, movements, discipline and incidents. Most entries concern the ship, not individual sailors, so read it for the ship's story on the dates a person served.
• How Do I Find a Ship's Log?
  Find a log from the ship's name and the dates of service, using the catalogue at The National Archives. A surname search will not find a log, because logs are catalogued by ship.
• How Do I Read a Ship's Log Entry?
  Read a log entry as a dated ship entry: position, course, events and remarks in sequence. One entry rarely explains an incident, so read the days around it.
• How Do I Track a Ship's Movements?
  Track movements through log position entries and movement records, in date order. A ship's name stays the same while its station and duties change, so dates anchor the movement.
• What If a Ship's Name Was Reused?
  Ship names were reused across different vessels, so a name alone does not identify a ship. Match the name with the dates and, where possible, the class or pennant details from the record.
• What Are Naval Action Reports?
  Action reports describe a ship's part in an engagement, written after the event from logs and signals. They add narrative to a log, but they are unit reports, not personal accounts.
• How Do I Use Ship Photographs as Evidence?
  A ship photograph proves appearance and condition at a time only when it is captioned or firmly dated by other evidence. Use photographs as prompts for log searches, not as substitutes for them.
• How Do I Research a Ship's Loss?
  Research a loss from the log, the action report and the casualty records together. One source alone can mislead on date, place or cause, so a loss is settled only when the sources agree.
• Will a Ship's Papers Name My Ancestor?
  Muster rolls and crew lists may name sailors for a commission or a period, but logs rarely name every rating. Absence of a name in a log is normal and is not evidence a person was not aboard.
• Ship Log or Service Record: Which Proves Presence?
  Only the service record posting proves a person served on a ship on a date; the log then shows what the ship did. Both halves are needed, posting plus ship action.
• In What Order Should I Research a Ship?
  Work in this order: service record ship postings, then the ship's log for those dates, then action reports and museum material. That order keeps the person anchored before the ship's story takes over.