Not military, just a large cargo ship with a helo landing area marked out on one of the cargo hatches. This is the kind of ship that carries large, non-containerized cargo to underdeveloped ports, or places with no port facilities. That's why it carries the cranes, one at each cargo hatch.
This area is used as an anchorage for ships waiting to load at the grain terminal just east of this location. If you look to the right you can see the terminal on the north bank just before the Bridge.