Why level bombers struggled against ships

How did Allied tactics make large multi-engine level bombers more effective against fleets at sea?

They largely did not use heavy level bombers that way; against ships at sea, more accurate dive bombers, torpedo bombers, and lighter aircraft were the practical tools.

The answer separates attacks on ships at sea from attacks on ships in fixed anchorages. Multi-engine level bombing proved ineffective against maneuvering ships, while a target in harbor could be struck with specialized weapons such as Tallboy bombs. The contrast helps viewers understand why dive bombers, torpedo bombers, and lower-level attack profiles mattered in naval air warfare.