Underwater search
Onetrack: Your idea makes intuitive sense however I wonder if search authorities have already considered and discarded this idea because there may be many shipping containers that have washed off of container ships that are already on the seabed in the search area.
Other potential limiters may be the great depth of the water and perhaps the need for such a detector to be quite close to be useful. The US Air Force has spent many years looking for a hydrogen bomb that was lost off of South Carolina with no tangible results to date.
I do not know the relative frequency of container loss events in the search zone but surely it must have happened before.
Last edited by averow; 7th Sep 2015 at 00:33.
Reason: Spelling