Boulevard de la Mer
This historic 677 casemate is easily located off the D514 road. If you are coming from Arromanches or farther west at Omaha Beach take the D514 until you reach a road called the Rue de la Marine. Take this road and you will almost immediately take a soft right onto the Boulevard de le Mer. There is ample parking available and the 677 casemate is located in far left corner of the lot.
I used two different cameras on the 2016 visit. The Nikon Coolpix 35mm and the Apple iPhone Six Plus.