Unless the helicopter was equipped with an automatic flight/hover control, this would be extremely difficult to accomplish. It could be vertigo inducing. I could envision the pilot then making the decision to climb and gain airspeed to break out on top of the layer, assuming there was a layer, and if radar showed him at 2400 feet, and an airspeed of 160 kts, he may have eventually succumbed to vertigo and lost control of level flight. Vertigo is a big killer of pilots. It is a condition of the inner ear that sends false sensations that conflict with what your instruments are telling you.
I can't express just how sobering that is to me. There are a lot of S-76s flying around relying on the aircraft system I support, which is what drives those very instruments.
