GNS 400W Series Installation Manual Page 3-3190-00356-08 Rev. G3.2.3 Enable CardsHTAWS is an optional function with the 400W Series units, and requires the enable card listed in thefollowing table.ITEM GARMIN P/NData Card, HTAWS Enable, Std (Note 1) 010-00882-00Data Card, HTAWS Enable, Upgrade (Note 1) 010-00882-01Note 1: The card will be serialized to the unit once it is used and therefore cannot be used with other units.3.3 Database OptionsITEM GARMIN P/NData Card, World Wide (Aviation Database) 010-10546-00Data Card, Americas (Aviation Database) 010-10546-01Data Card, International (Aviation Database) 010-10546-02Data Card, Terrain/Obstacle (128 MB) (Note 1) 010-10201-20Data Card, Terrain/Obstacle (256 MB) (Note 1) 010-10201-21Data Card, Terrain/Obstacle, Helo, Americas North (2GB) (Note 2) 010-00874-01Data Card, Terrain/Obstacle, Helo, Americas South (2GB) (Note 2) 010-00874-02Data Card, Terrain/Obstacle, Helo, Atlantic North (2GB) (Note 2) 010-00874-03Data Card, Terrain/Obstacle, Helo, Atlantic South (2GB) (Note 2) 010-00874-04Data Card, Terrain/Obstacle, Helo, Pacific North (2GB) (Note 2) 010-00874-05Data Card, Terrain/Obstacle, Helo, Pacific South (2GB) (Note 2) 010-00874-06Data Card, Americas, Helicopter (Aviation Database) 010-00875-01Note 1: Data cards 010-10201-20 and 010-10201-21 are functionally equivalent.Note 2: High resolution terrain card 010-00874-( ) is required for HTAWS operation, optional for other.3.4 Miscellaneous OptionsITEM GARMIN P/NGPS 1.57542 GHz Notch Filter 330-00067-003.5 Optional Reference MaterialITEM GARMIN P/N400W Series Pilot‟s Guide 190-00356-00400W Series Quick Reference Guide 190-00356-01Addendum – 400W/500W Series Display Interfaces 190-00356-31Addendum – 400W/500W Series Garmin Optional Displays 190-00356-30GNS 400W/500W Series Training CD 010-10601-00