Magnetic exploder main flaw was in the theory itself - a ship traveling north/south versus a ship traveling east/west will have different shaped magnetic fields, which is why the same setting would pass a foot under a target on one course and premature 100 yards from the beam of a target on a different course. Also the magnetic mine was developed before the magnetic exploder in torpedoes, which is why the early German torpedoes didn't work - the British were degaussing their ships to defeat the magnetic mine, and unknowingly protecting their ships from the torpedoes at the same time. There's also the problem with earth's magnetic field not being consistent - there's nothing supernatural about the Bermuda triangle, it's just an area with large iron deposits close to the surface which makes compasses go crazy. I used airborne magnetic anomaly detectors back in the 70s, and those had to be calibrated every time you flew.
In my opinion Ralph Christie should have been court martialed, keelhauled, then forced to walk the plank, that bozo was insisting the magnetic exploders were fine 3 years after the Germans found out they didn't work.
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