Ah yes, I forgot! While coastal artillery is actually usually built-in, often bunkered with limited field of fire we have here 360 ° mortars and these, of course, with so-called indirect fire-control-radar or possibly satellite-based? [To get the f-c-r running, take a balloon pulling up an old steel plate; because of the reflection and so on ...

....

]
The other is a problem of dangerousness. Because of the limited negative elevation on battleships, these are likely to be safe near the shore 'cause no threat (

), while an approaching submarine is particularly highly dangerous to near-shore infantry & Co.: (see 2:35 ...)
It reminds me that I need to see the movie again; Already for radio operator Hornsby ...