Preheat oven to 350 degrees. Cream together butter and sugar until light and fluffy. Beat in eggs, vanilla and water. Sift flour, soda and salt into creamed mixture and stir well. Fold in oats, raisins, dates and coconut until well blended. Drop dough by rounded tablespoons onto greased cookie sheet. Bake for about 10 to 12 minutes or until golden brown. Remove cookies from oven. Transfer cookies to racks and allow cookies to cool. When cool store in air-tight container.