Hello .. I just received a Lowrance GPS Model H2O .. ( 30 year Aniversary gift from work .. yes .. my mind was on fishing when I chose it ! ) . Any comments on what type of Mapping Card I should buy ? I am new to this .. so I don't know much about the unit(s) . I read a thread that the Flowage was mapped this year for GPS usage ( Mapping Specialists ?? ) .. would this card work in my unit ( when published ) ? Any suggestions would be appreciated .. Thank you .. Tim