Jon Landau was a problem solver.

When the ship prop for the “Titanic” wouldn’t sink fast enough, the Oscar-winning producer jumped into action, assembling a team of workers who cut, welded and removed solid floors and replaced them with mesh — all over the course of a weekend.

“By the start of shooting on Monday, that sucker sank,” director and writer James Cameron, Landau’s longtime collaborator, wrote in the foreword to Landau’s new book. “Boy, did it sink. It scared the crap out of us.”

Solving problems like a too slow sinking ship is all part of being a producer, Landau wrote in his posthumously published memoir, “The Bigger Picture: My Blockbuster Life & Lessons Learned Along the Way,” released Tuesday.

Just as important is creating an environment where each crew member was seen a

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