I took a short trip this last weekend to visit my sister near Palm Springs and passed by the Salton Sea on the way. I don't have the navigation option in my base ST, but as most of you know, all STs come with the GPS hardware regardless of whether or not they have the optional maps. Anyhow, I got curious to see how close the Fiesta GPS was when compared to my handheld Garmin and was surprised to discover that the Fiesta did not show any elevation below sea level! What should have read -170 ft. just read 000. So I was wondering if this discrepancy also holds true if the navigation option is installed. Has anyone else noticed this inability to read below sea level?