GTW,
My tongue-in-cheek point was that the spokesman was probably misinformed. Non-decompression diving, which is what I and most recreational divers do, is limited to 30m. Deeper than that, you will need a decompression stop, on top of the safety stop which most divers do these days.
I am sure military divers, using conventional SCUBA gear, routinely go below 30 m, with appropriate safety measures and decompression stops.