A code in which each data signal conforms to specific rules of construction so that departures from this construction in the received signals can be automatically detected, permitting the automatic correction, at the receiving terminal, of some or all of the errors.
Reference: I.E.C. (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM