Hi Marcel, I believe you're referring to cards for chart plotters. At that time we had a small Garmin chartplotter with Garmin BlueCharts on microSD. We also had CM93 charts on OpenCPN. We no longer have a chartplotter, instead using Navionics charts & app on iPads.
We did it over about a year, leaving Zen Again in Bali over part of the cyclone season. The story starts in our blog at yachtzenagain.blogspot.com/2013/08/farewell-to-boat-lagoon.html
Hi guys I’m thinking of doing a trip from Broome going to Indonesia when it’s the best time to do such a trip I have a 70f with a maximum speed of 12 kn per hour By the way I love your videos