I knew the 139 constantly reviewed the performance data and gave you a min height for hovering that would allow a flyaway - does the S-92 do the same thing?
The Sea King obviously doesn't have any 'drop-down' data in the ODM to calculate height loss whereas the Lynx does have graphs for predicted height loss in the hover (into wind). We do have the ability to hover higher to maintain a flyaway but the assessment of performance is still only based on hover torque even though the proximity to ETL makes a huge difference to the height loss during the flyaway.
Junior pilots will always want a simple 'one-stop shop' answer to flyaway or not flyaway but there are so many variables that it is impossible to shortcut experience. For example, tonight we were hovering at 125' alongside a large car carrying vessel - we were about 100 degrees out of wind and the boat was doing 15 kts - our airspeed across the disc was next to zero and when the HP tried a practice flyaway we had to throw it away so as to avoid the water. He flew a normal profile of 1 or 2 degrees nose down as he would into wind and it didn't work - when we tried it again with 7 or 8 degrees we made ETL and flew away with relative ease.