Complex sentence: When painted on the fuselage, the prefix and suffix are separated by a dash (for example, YR-BMA), but when entered in a flight plan, the dash is omitted (for example, YRBMA).
Split into simpler sentences: When painted on the fuselage, the prefix and suffix are usually separated by a dash (for example, YR-BMA). When entered in a flight plan, the dash is omitted (for example, YRBMA).