You''ve got several options of passing data *via* the internet but true internet access is both difficult & expensive.
1. Laptop access is possible (e.g., see AT&T''s worldnet service) but, to pull down more than just email, is very expensive.
2. There are many ways to send/receive email (incl. attachments) via SSB and a Pactor TNC. See winlink.org/wl2k for (free) ham access, or visit sailmail.com for non-profit Marine SSB access. There are also many private vendors (Pinoak Digital, MarineNet, CruiseEmail, etc.) that will provide for-profit Marine SSB service. But all these are essentially email programs except Winlink, which also offers many hundreds of internet-based files of interest to a cruising sailboat (e.g., wx faxes, text f''casts, wave/wind projections for all parts of the world).
Lying Port of Spain, Trinidad