A search result has the right brand and a familiar-looking cover. That is a promising lead, but it does not establish that the manual belongs to the equipment you are researching. Similar product names can hide important differences.
Make an identity card
For an ordinary documentation exercise, record the manufacturer, exact model, available identifying details and the source of those details. Use existing records or ask the responsible owner; do not disturb equipment to obtain a photograph.
Find the manufacturer’s documentation page and compare the document’s stated coverage. Retain its revision or publication information. A filename such as “manual-final.pdf” is less helpful than a note identifying what the manual actually covers.
Separate matches from leads
Use two folders or lists: confirmed references and possible references. An almost-matching manual belongs in the second group until its applicability is established. Add the question that remains unresolved.
For example: “The model name matches, but the revision’s coverage is unclear.” That sentence gives the owner or manufacturer a concrete issue to answer.
This is document organisation, not equipment servicing advice. Follow the responsible person’s procedures and qualified guidance for operational work. Keep your reference index distinct from a personal sailing journal: one supports document retrieval, while the other preserves what you learned and noticed.