SASless, Yes, it was called taking off and going flying. Many moons ago (30years) during my initial S-76A training, Cat A was explained as a selling point since the S-76A was certified for Cat A operations. The RFM included all of the appropriate charts. A close look at the charts revealed that, to meet Cat A requirements at gross weight, one would need an unobstructed helipad about 1500 ft in diameter. That is just what we had at Stratford.