...don't forget the alleviations from the HV curve contained in FAR 91.9(c) and Appendix 1 to JAR-OPS 3.005(c).
Fortunately there is a move by EASA to resolve this (at least for Europe); they have it on their work programme to be addressed before EASA OPS comes into effect.
How will EASA OPS address this issue? Seems like it has already been addressed (outside Part 29) by FAR 91.9(d) and Appendix 1 to JAR-OPS 3.005(c) for heliports constructed over water. Will EASA OPS specifically address HEMS in addition to heliports constructed over water?