Military Ancestor

Merchant Navy Records Supporting guide

How Do I Find a Merchant Seaman's Record?

Find a merchant seaman's record from the discharge book number and the ships served on, using the catalogue and indexes at The National Archives. A name alone will return many seamen, so the number and the ships are what narrow it.

Published 31 October 2026 | Independent educational guidance | Deceased persons only

Filed under Merchant Navy Records: A Method Guide

What should you look for first?

Find a merchant seaman's record from the discharge book number and the ships served on, using the catalogue and indexes at The National Archives. A name alone will return many seamen, so the number and the ships are what narrow it.

A record that names the right person in the wrong unit, or the right unit on the wrong dates, is a lead, not a match. What you do not know matters as much as what you know, because a search built on an assumed date or an assumed unit will miss the right record. Do not let the first record you find set the shape of the research. The first record is a starting point, and starting points are often unrepresentative.

How do you work through it step by step?

Do not skip the step that checks the filters. It feels redundant when the filters seem obvious, and it is the step that catches wrong persons. If a step produces nothing, record that nothing. A documented negative result is part of the research, and it stops the same step being repeated blindly. A missing entry is a finding. Note its dates and what kind of record might fill it, instead of filling it with a plausible story.

StepWhat to do
1Fix the seaman identity details, name and any discharge number, before opening ship records.
2Use the discharge book to list ships and voyages in date order.
3Open the crew agreement for each ship and voyage, and note its reference.
4Test every ship movement against the discharge book before adding it to the timeline.

Reading what the record actually says

Do not assume a modern map, a modern rank table, or a modern unit list applies to a record from another decade. Check the period source for the period entry. An entry that gives a town but no county, or a camp but no town, is deliberately vague or locally obvious. Local knowledge, not a global search, usually settles it. Numbers matter more than names in these files. A service number, a roll number, or a piece reference will survive spelling changes that defeat name searches.

What are the common dead ends?

A search that works for one service may fail for another, because services filed differently. A method that fits the Army may mislead in the Navy, and vice versa. If a unit record is missing for the exact week you need, the neighbouring weeks, and the higher formation record for that week, may still fix place and date.

When a record set ends before your dates, or begins after them, the problem is coverage, and no variation of search terms will fix a coverage problem. A unit, ship or camp that cannot be fixed from the clues available is a reason to gather one more clue, not a reason to guess the most likely candidate.

Where to go next from here

Where the next step involves a different holder, take the reference with you. A holder approached without a reference can only offer general guidance. Cross-check, rather than collect. One record confirmed by a second, independent record is worth more than five records that all repeat the same source. Do not let a satisfying story override an awkward record. The awkward record is usually the one telling the truth.

Primary sources for this guide

Everything here is kept general and tied to official holders, so check the current position with the holder for your own case. The guide is educational information only: it is not personal professional advice, it is not a lookup service, and it settles nothing about any one person's service.

Please note: Coverage here is limited to deceased persons, and living people's privacy is protected: no material on this site identifies a living person from a service record. A holder's process, where described, should be followed as the holder currently sets it out.