Kystfort

Hello
I'm planning a trip to visit this batterie .
In the book of J.B.Wahl I can find a map, but it will helpfull to have coordinates.
Who can help me about this information.
Greetings
Tom

Hello
Sorry, I can't write in your language.
Question: At Flieder I saw some open emplacements. Can anyone tell what there use was.
Tanks and greetings
Tom