Definitions for "Aboveboard"
Above the board or table. Hence: in open sight; without trick, concealment, or deception.
without concealment or deception; honest; "their business was open and aboveboard"; "straightforward in all his business affairs"
in an honest manner; "in he can't get it honestly, he is willing to steal it"; "was known for dealing aboveboard in everything"
Keywords:  waterline, ship, areas
Areas of the ship above the waterline