I am sorry if this is a repost, and you saw my notice from the Great Loop Forum. My name is Skip Cook. I did most of the Great Loop in 2006. I still have my six Navionics Gold chips. I used them in a Raymarine C120. I do not know the other units that use these chips. I would check with the manufacturer of your unit. 2006 retail price, $185/each. They are all 128mb CF chips (picture attached) List of chips: CF/1G906XL3 US Southeast-Bahamas Jun 2005 CF/905G Mid Atlantic & Canyons Jan 2006 CF/901G East Great Lakes Jan 2006 CF/900G West Great Lakes Jan 2006 CF/918G Northern US Rivers Dec 2004 CF/919G Southern US Rivers May 2005 These chips have not been updated, but I have used the West Great Lakes chip for the last 6 years and really only a few marina names have changed. The software on my 2006 Raymarine C120 has been updated and these chips still work. Selling them because I have moved inland (Lake Norman, NC). Let me know, if you are interested. Skip cbcyt@aol.com