What must change before navies deploy larger uncrewed warships

What would need to change for uncrewed naval vessels above 3,000 tons to become practical?

Navies need settled escalation and liability rules, secure command-and-control, reliable autonomous navigation, and workable maintenance before accepting the risks of larger hulls.

States first need clear rules for whether attacking a large uncrewed warship constitutes an act of war and who answers when it collides with another vessel. The remote operator, nearby commanding officer, government, shipbuilder, or software supplier could each face competing claims of responsibility. Command links and onboard software must also resist takeover because a hacked vessel at this scale carries both expensive systems and potentially dangerous weapons. Maintenance and safe navigation standards must work without a normal ship's company. Roughly 2,000 tons remains a useful threshold, large enough for a capable vessel without making every technical or legal failure strategically devastating.