 These ships had a distinctive cowl top on the funnel and were fitted with Babcock & Wilcox water-tube boilers and three Parson type turbines geared down to a single shaft, giving approximately and a speed of .Electrical power came from generators driven by three Ruston Hornsby diesel engines.Three refrigerated motor ships "S.A. Langkloof", "S.A. Zebediela", and "S.A. Hexrivier" were built to export temperature controlled fruit from South Africa to the UK and Europe.