So, took the bull by the horns and asked AI why the Navy would want a radio cabinet made out of non magnetic material:

The US Navy would prefer a radio cabinet made from aluminum or stainless steel for its non-magnetic properties to minimize interference with sensitive electronic equipment and to enhance the effectiveness of electromagnetic shielding. These materials help ensure that radio signals are transmitted clearly without distortion from magnetic fields.

So, there you go...must be the truth since it came from the internet.   Let's see what the consensus is in all 57 states.

Charlie W4MEC in NC