The Bockmaster Survey Boat

I saw this boat on Saturday.

 Based on what it says on the side, it is a survey boat but when I tried to look it up, it said dredger.

 It looks a little too small to be a dredger.  So I wonder if it is a vehicle to verify the dredging activities.

 Anyway, it was a pretty neat look boat.  It's always cool to see some of the other boats that occupy the lakes.

 As it was coming in from Lake Huron.

 Entering the channel.

One more view.