G´day all
I´ve been snoopin around in various norweigan sites, Robert, but unfortunately could not find any mention of the specific depth for this Amatol charge when being disarmed. I can however tell you the charge was not blown up
in situ but actually transported further into the fjord, this to avoid damage to nearby fish farms, triggering rockslides from the mountainside etc.
That job alone required two days; examine the charge, removing parts of the bomb hull for better access, building a frame for transportation. Once the charge had been relocated work began on detaching parts of historical value for closer inspection, parts such as the detonator tubes. These tubes did not come off easy, they eventually had to use small blast charges to separate them from the motherload ... this while running the risk of setting off the main charge.
http://forsvaret.no/aktuelt/publisert/n ... gning.aspx
The video did not play but the slideshow below displayed some interesting images, such as the recovered detonator tubes.
The demolition charge deployed for the final explosion weighed in at some 25 kg, if someone should hold an interest in that particular detail. However as I stated initially the depth set for the final explosion is still not known thus the water column by itself tell very little other than the detonation likely taking place in fairly shallow water. I´ve seen such water columns several times during my service as I´m sure Olaf has too. In those cases we were clearing World War Two mines, (magnetic bottom mines, if my memory serves me correct) none of them a monster like this.
Kind regards