By the way, for the record... I was trying to answer his question for hardware.
What I use (FWIW) is an iphone with Navionics... $10. Wife thinks my best route forward is an ipad in a bump case mounted on an arm and permanently installed in the boat.
I don't have a Depth Sounder, OR a Knot meter.. but then, I only sail on an inland lake right now. I use the navionics for navigating at night mostly.
I agree with the assessment though, that once you are spending $400 or more, getting a proper chart plotter is a WAY more reliable way forward.
CRED: IT Manager/Network admin for 12 years. Was a Telecom/Datacom engineer for 4. BSEE by education, and my first IT consulting job at age 13, 27 years ago. My sailing experience is nearly as old, started at age 8. However, I mostly have only crewed on larger boats 19, 27, 23, 34. I have only owned a 14 capri and a 22 capri.
I am an OS independent. I use what runs what I need it to.
I apologize too for any soapbox diatribe, Ive made.
If this is intended "play project" then I am anxious to hear what you do wind up with. Yes the Touchpad sold at many stores and online for $99 2 days ago. WebOS was the most recent generation of Linux (gasp) first developed by PALM. webOS - Wikipedia, the free encyclopedia