Cream butter; gradually add sugar, creaming well.
Add water and vanilla. Beat well. Blend in flour, salt and pecans; mix well.
Chill for easier handling, if desired.
Shape dough, approximately 1 tbsp. at a time, by rolling between hands into strips about 3 inches long.
Curve dough in shape of crescent or half moon. Place on ungreased baking sheet.
Bake at 350* for 12-15 minutes. or until set but not brown. Cool; roll in confectioners sugar.