This is why keep pushing my daughter towards a trade school. (Once you become immune to eye-rolling life gets easier.) There's a lot of companies with unfilled skilled blue collar jobs. And despite self-driving trucks, semi drivers can make some serious money. And HVAC projected job growth is 14% over the next 10 years. Thank you Global Warming!
You can easily pay off your student loans very quickly, you get to see the world, and if you do it right, you have little to no expenses while you're sailing and can bank that money for when you quit.
For most people though, I don't recommend making it a long-term career though. It can be dangerous, and I always felt like my life was on pause while many of my friends were getting married, having kids, etc. (And I worked with a lot of older men who did not have good family/wife situations.)
One can certainly get a desk job with a Marine Engineering degree, but one leaves so much on the table if they do.