Thanks for the replies so far.
As far as weather is concerned, does Mahle ever require instrument approaches, obviously being tropical it would get the usual CB activitiy and short periods of bad wx.
Reason I ask is that most small biz jets wont have the legs to divert to mainland India so you really only have Gan island as an alternate. So when you depart you have to be sure you can get in.
The Norfolk island ditching has really put a different light on remoat island destinations.