"Jetcap" wrote in message

The point is, informed by whom by what means? Shipping is a very quiet
business and shipowners and managers are not too keen on telling the world
who is where and going in what direction while on the open sea. And while
sailing yachts may be fun to watch at sea, tracking them is more than the
crew has time or desire to do.

There maybe a point you are not considering Rick... the information is a one
way feed. All they need do is supply proposed track and route to the
agencies involved. No information from the agencies or shipping is required.
Private yachts do indeed monitor ham or SSB or VHF or Satphone... plus many
have weather routers on ham/ssb that they contact daily for updates.

CM