Well this was an oddity...

[MontyB]

The Time Germany Grafted An Army Howitzer Turret Onto A Frigate

The bizarre-looking modification installed the turret of a PzH 2000 self-propelled howitzer onto the frigate Hamburg. The bizarre-looking modification grafted the turret of a PzH 2000 self-propelled howitzer onto the frigate Hamburg.

www.twz.com

But an interesting idea from a logistics point of view.

 

[George]

The Soviets built gunboats with tank turrets during or after WWII, so I guess the difference is the increased performance of the modern Army howitzer vs the naval guns.

 

[MontyB]

The Soviets built gunboats with tank turrets during or after WWII, so I guess the difference is the increased performance of the modern Army howitzer vs the naval guns.

They seem to have dropped the idea in favour of retaining the 76mm as it has a far higher rate of fire seems range is not as important to the navy as it once was, I think the benefits of having less calibres to deal with in terms of logistics and procurement would be significant though.