Would this have saved JFK Jr?

Check out this post from James Fallows:

A small plane apparently crashed last night on Nantucket Island. First reports are never quite right, but it appears that the weather was terrible -- dark; very low clouds; mist and fog; sea, sky, and land in a blur. These are deadly conditions to fly in, and the same conditions in the same area killed John F. Kennedy Jr. 8 years ago.*

(from: Would this have saved JFK Jr?)