We took VALIS out to Alcatraz for Fleet Week, and what an interesting
day it was! In addition to some impressive ships, and some amazing
demonstrations of air power and grace, we learned first-hand (again)
what boaters mean when they say that anchoring is the second-most
stressful thing we do (anchoring next to dozens of other boats with
changing [...]

After playing with this stuff for several days, I have added some cool
features to my AIS data postprocessor programs. Many of them are
invisible, added to make the system more convenient, but one nice
feature is that each ship now has all its tracks combined into a
“folder”, allowing you to show or hide tracks for individual [...]