I want to know the answer to the following question:
What north sea port was the secondary target for bombers that could not find their primary target?
All the background I'm provided with is that "The North Sea port of Hull, a convenient and easily found target or secondary target for bombers unable to locate their primary targets, was subjected to 86 raids in the Hull Blitz during the war, with a conservative estimate of 1,200 civilians killed and 95 percent of its housing stock destroyed or damaged.". Is that enough to answer the question?