Arms have to be heraldically correct to qualify for registration, which remains voluntary. The present shape of the boat and the more heraldically correct arms date from 1899. The latter would have been heraldically identical to the old Waldgravial arms. In heraldry, dimidiation is a method of marshalling (heraldically combining) two coats of arms. Since 1976 the dolphin has been depicted naturalistically rather than heraldically. It is described heraldically as "per fess dancetty of three points argent and gules".