The Netherlands Coastguard uses this card to facilitate identification of reported explosives.
Click here to download the explosives card in pdf format (front)
Click here to download the explosives card in pdf format (back)
Actual PDF overview of found and (not yet) removed explosives in Dutch and British area.
On the left an example of a seamine
Overview since april 2005:
Explosives reported 1435
Not found 368
Open UK Area 7
Open NL-BE Area 13