Jimmy 16, rest assured FSF ALAR Briefing Note 7.2 formed part of my initial study of CDFA for helos and is now part of this weekend's revision homework.
SAS, while CDFAs may have merit offshore, (a) the derivation and presentation of a "nominal vertical profile" to decks at unique elevations may not be straightforward (I'm not saying impossible) and (b) it is an extension of the present NPA Onshore discussion and has the potential to muddy the waters.
... although this IS pPrune, of course.