With all the smart tech being developed for cars to drive themselves, Google global mapping, gps and satellite imaging, a shoal anywhere in the world could potentially be warned about in nano-seconds. That, of course, doesn't mean it is available or being used now.
The tracking systems being used are first rate, the auto-vicinity alarm systems are not there yet.
Since all this tech is relatively new and racers have been not running aground for centuries before now, I'm interested in reading about why Greenings ran aground. It looks like all navigation, today, takes place below deck. Maybe this is a wake-up call to poke your head outside once in a while.
-Will (Dragonfly)