If you need to email very inexpensively from the boat, and don't have a Pactor 3 TNC for Winlink 2000 or Sailmail HF SSB email, then do go and read this:
Beta testing for the Winmore (Virtual TNC)
protocol software has been running for about 3 weeks now, and looks VERY
Pretty soon you will be able to send and receive emails from the High Seas or some little remote cove, into the Winlink 2000 system for pennies on the dollar at greater than Pactor 2 speeds. - All from only your laptop's soundcard
. (NO TNC needed.)
It works on my laptop, and will soon be a great backup to the TNC.
Click to see a discussion and how to, here: