I recently purchased a Platinum S card to work with my HB 597 ci HD. The first time out on the lake the map detail came up for a bit but then it went to the basic lake outline. The second time out it didn't come up at all. I read several posts and tried getting the map detail to come up while setting in the drive way at home. Sure enough everything worked fine. Yesterday took some friends out thinking we could get into some good fishing. I turned on the locater, went to the map view and bingo the basic map again. Checked everything but couldn't get the detail to come up. Tried it again this morning in the driveway and the detail came up. Has anyone else gone through this? If so, please let me know what I am missing.