Looking to dive San Miguel seamounts

[kawikac]

Hi,

I have it in mind to launch a whaler via the Gaviota hoist and
head for Richardson Rock, Wilson Rock, Boomerang, and/or Skyscraper.

Apart from the usual cautions associated with any offshore dive,
can anyone provide specific advice that might make the trip run
more smoothly (i.e. anything unusual about the hoist?, GPS for
good anchorages, etc)

Thanks,
Kawika.