How usable were Soviet tank turrets on gunboats?

How well did Soviet tank turrets work on gunboats, given the T-34 turret's poor ergonomics and crew comfort?

They were as cramped and difficult as expected, although some areas of the gunboat carried more armor than the tanks that supplied the turrets.

Using mass-produced turrets was practical from a supply perspective, but that did not make the working conditions good. The small hull and familiar T-34 turret limitations made operation uncomfortable and demanding. At the same time, the boats concentrated surprisingly heavy protection in selected areas. Production efficiency, crew usability, and battlefield survivability did not always point in the same direction.