[Varley]

I cannot think of any engineering approach to efficiency would materially affect her ability to manoeuvre responsively.

(Like for like of course, container ships of this size have a very large area exposed to the wind as ro-ros have large open vehicle decks which increase free surface problems in the event of some damages. If tankers trade was limited to water carriage there would be less risk of fire or pollution, should they be able to find bunkers).

Enabling technologies and designs address better somethings - efficiency/economy/an entirely new seabourn trade/purpose (well stimulation, windfarm servicing etc.). Regulations ensure only that the risks that go with the design are manageable not that they are fewer.