I would go with some sort of survey vessel.
This looks like, if you keep it modestly sized, a ship made for observing deep space and tight areas like, say, a system with a very large/heavily clotted asteroid field/nebula.
Put on a few radar dishes and you suddenly have a sonar platform..
That's just tossing a random suggestion out there, though
One of these days, there will be a clever, stylish and/or funny signature here.
This is still not that day, however.
