Did submarine milk cows count as tenders?
Short answerTo an extent: they carried some other supplies, but their primary role was fuel supply.
NotesSubmarine milk cows fit the tender category to an extent because they supported other vessels and carried some supplies. Fuel remained their main cargo and purpose. The comparison shows how auxiliary labels can overlap while still leaving room to identify a ship's dominant logistical function. Their tender-like relationship did not erase their primary role as fuel carriers.