What addons are most useful?
The most useful accessory is a plastic bag. It’s a very low-tech way to protect your PDA when you go out on deck. CelestNav’s sight entry screens are designed so that you don’t need your stylus to take sights–just your fingers will do fine. Setup, planning, and fix computation do need the stylus. One solution to the rechargeable-only trend of manufacturers is an external charger that uses AA or AAA batteries to charge your PDA. You can find these at http://www.hslight.com/products/ and http://www.wholesale-pda-accessories.com/BC .html. I’ve heard rumors that that Garmin iQue 3600 will have a similar accessory available. Disclaimer: I’ve seen these in catalogs, but have never used one. Software that belongs on every navigator’s PDA includes Big Clock (especially handy for setting the PDA’s clock time to the nearest second); BackupBuddyVFS for self-contained backups of your PDA to expansion cards; and TideTool, for tide and current predictions. Dale DePriest maintains comprehensive list
