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When three galaxies fall within a few diameters of each other on the sky and are disturbed, they are classified as an interacting triple. Sometimes there are smaller galaxies present which would make the group into a quartet or quintet if they were considered dynamically important. The classification in the present Catalogue is based on a subjective decision as to which are the main galaxies that effect the interaction.

3a. Simple Interacting Triples

Three galaxies of any type which are roughly the same size, and appear disturbed, are classified into this sub-category. In AM 1914-603 note the displaced fourth member which could also put it into Category 18. In AM 0110-582 a good example of a jet is seen emerging at low surface brightness from the companion to the south-east. In AM 2341-321 the interacting triple has a common envelope and lies north-west of a large, low-surface-brightness galaxy. This object is also illustrated under Category 8.