Why Royal Navy engineers often had Scottish accents

Is the film stereotype of a Scottish, often Glaswegian, ship's engineer grounded in Royal Navy history?

Partly: many engineers came from major shipbuilding centers such as Glasgow, Newcastle, Portsmouth, and Chatham, reinforced by family-service traditions.

Engineering recruitment drew heavily from communities around the great naval and commercial yards, making some regional accents more common in machinery spaces. The pattern was never universal, since sailors could serve throughout a ship. Family traditions within the British armed forces helped the regional association persist.