It's always a shock to see your work appropriated without notice or compensation.
There are a couple of different ways to look at it. It's of course natural to be outraged at theft of content. Unfortunately, the internet makes it too easy to find and re-use content. The flip-side of this is that now it's MUCH easier for everyone to get information, and for people (like MS) to earn a wide following and respect, which can potentially bolster his marine service activities.
Hence, there's two possible reactions:
1) protective - try to prevent appropriation, go after unlawful use
2) opportunistic - make it known that your work can be republished but only with your permission and a proper attribution is given to you, along with a link back to you.
It's MS's call as to which response is most appropriate, but successful prosecution is prohibitively expensive for the little guy. One option is to try to get your work officially published (and you really should, it's more than good enough), and then the publisher has a vested interest in defending the rights they've just paid you for, and the muscle to pursue offenders.
Good luck with this.