Imagine the costs of maintaining and operating a nuclear ship, compared to the relative ease of making a big floaty box and dropping the cheapest "efficient" en

Imagine the costs of maintaining and operating a nuclear ship, compared to the relative ease of making a big floaty box and dropping the cheapest "efficient" engine you can into it. You could push those things out the door pretty regularly, and get anyone to turn the key and push it around. Just the regulations involved with manufacturing and fueling probably makes nuclear cargo ships an economic impossibility, forget about running them across the ocean.