As much political and public disagreement there was about the defense line, everybody recognized the necessity of the coast and naval defense.
The coast defense around Copenhagen consisted of 3 defense lines.
The inner line: Three old forts and rebuilded batteries along with three new constructions
Coastal Battery Kalkbrænderi Battery,
Naval fort Mellemfort
Naval fort Prøvestenen
Den middle line consisted of
Coast battery Charlottenlund Battery, (later mentioned as fort)
Naval fort Middelgrundsfort
Coastal battery Kastrup Battery. (later mentioned as fort)
On the southern and northern flank of the defence line, two naval batteries was constructed
Coastal battery Hvidøre Battery
Coastal battery Avedøre Battery
Den outer linie consisted of
Coastal fort Taarbækfort
Naval fort Flakfort ,
Coastal battery Barakke Batteri
Coastal battery Saltholms Batteri
Naval fort Dragør Fort,
Coastal battery Kongelunds Batteri (later mentioned as fort)
Coastal battery Mosede Batteri (later mentioned as fort)