Thank you for the replies.
I am just wondering from the suggestions if I should link this to the Rotor or Military sub-forums, now. I should think the Wessex pilots in the community would probably frequent both, so I will go with the Rotor Heads for better exposure. I have always had the same thought about the rarity of jumping from a helicopter, and thus the improbability of it being a dedicated function on a flight computer for that purpose alone. I don't know, however.
Hopefully we can get to the bottom of this, and how it is used, perhaps.
PS: I will send the manufacturer a note; hope they reply.