Below are the code numbers along with the year of release for the HotMaps Premium South region.
PREM-S6 – 2010 HotMaps Premium South
PREM-S5 – 2009
PREM-S4 – 2008
PREM-S3 – 2007
PREM-S2 – 2006
PREM-S - 2005
What Navionics charts are included in the Humminbird NVB models?
On Humminbird plotter models designated with the NVB suffix (Navionics Value Bundle), Navionics' most important HotMaps Premium lake maps are built into the unit, as well as select marine charts for the continental US. There are no downloads, nor unlock keys needed – just turn the unit on and have full access to over 150 of the most important surveyed lakes offered by Navionics in high-definition (HD) 1' contours, plus complete fishing detail for an additional 8,000 US lakes. The 150 surveyed lakes and 8,000 additional lakes have every bit of detail found in Navionics' various HotMap Premium products. If your specific lake of interest is not included in the Humminbird NVB lake list, additional surveyed and supplemental lakes are available from Navionics retailers on MSD media cartridges that are compatible with your Humminbird model. The Humminbird 900 and 1100-series plotters are also compatible with Navionics HotMaps Platinum lake maps which offer 3D lake bottom views, panoramic pictures and top-down satellite photo overlay for all HD surveyed lakes. Please follow this link for Humminbird NVB lake listing
http://www.navionics.com/HUMMINBIRD%20NVB%20LAKE%20LIST.htmlPlease follow this link for Humminbird NVB marine charts
http://www.navionics.com/HUMMINBIRD%20NVB%20MARINE%20COVERAGE.htmlThe true benefit of having an NVB unit is you will always have built in charting data.