Royal Navy trawler totals depend on what is being counted

Did the Royal Navy operate about 2,000 trawlers during the First World War?

Only under a broad definition. Roughly 1,400 fishing vessels served in the Auxiliary Patrol, alongside smaller categories of naval and hired trawlers.

A claim that the Royal Navy had about 2,000 trawlers needs a category check. The total may combine purpose-built naval trawlers, hired or requisitioned fishing vessels, and other craft used for patrol or minesweeping. Manning provides a useful test because 2,000 regular naval vessels would demand far more sailors than a mixed force retaining civilian crews with a few naval specialists. Roughly 1,400 fishing vessels serving in the First World War Auxiliary Patrol provide the more defensible comparison. A single trawler total can hide major differences in ownership, crewing, and legal status.