Hi Michael,thanks for your fast and accurate answer.

What you mean with : these would be three mines each from ?
Three mines in the "line" from X to Y coordinates ?

Info about the sinking are absent from the web,someone say by torpedo,others from mine,maybe because U72 was a minelayer,if i'm not wrong.

I'm not very specialized in research outside Italy,have you some info where to look for the questionnaire ?

Hope Mr.Lorscher will jump in this 3d,sometimes is exciting look outside home waters. :-)

Massimo.