Guide to shipboard internet
Although sponsored by Inmarsat, this is a nice guide to help you get the most out of your internet connection while at sea. I like the fact that they are specifically mentioning the use of instant messaging software as a very efficient means of communication.
“One particular application, familiar to most land-based Internet users, that becomes economically viable through MPDS is instant messaging software, available for free from companies such as Microsoft, Yahoo and Netscape, and for business functionality from eg. Mediachase (www.mediachase.com).”