As much political and public disagreement there was about the defense line, everybody recognized the necessity of the coastal and sea defense.
The importance of the Navy was never an item in the debate.
The coastal and sea defense around Copenhagen, ended up consisting of three defense lines.
The Inner Defence Line:
Three old forts and rebuilded batteries along with three new constructions
The coastal Battery Kalkbrænderi Battery,
The sea fort Mellemfort
The sea fort Prøvestenen
Den Mid Defense Line
The coastal battery Charlottenlund Battery,
The sea fort Middelgrundsfort
The coastal battery Kastrup Battery.
On the southern and northern flank
Two coastal batteries was constructed as part of the mid line.
The coastal battery Hvidøre
The coastal battery Avedøre
The Outer Defense Line
The coastal fort Taarbækfort (also a land fort)
The sea fort Flakfort ,
The coastal battery Barakke Battery
The coastal battery Saltholms Battery
The sea fort Dragør Fort,
The coastal battery Kongelunds Battery
The coastal battery Mosede Battery
(The major batteries are later, rather incorrectly, referred to af forts. Originally they are referred to as batteries).