Originally Posted by J805
I imported a database off a boat
which had a bunch in them. I'm guessing it was accidental.
The bahavior is by design. If you really have a lot of them, the easiest solution usually is to use a text editor on the GPX file (or directly OpenCPN's navobj.xml, which is also a GPX file) and make them not MOB using it's search and replace functionality.
To do that, you simply replace
with for example