Communication is a central activity in command and control. However, analysing communication using linear transcription of large amounts of sequential data is tedious and time consuming. This paper describes an alternative approach to communication analysis based on visual exploration of abstract representations of communication. It introduces a visualisation technique based on the Attribute Explorer. The technique was implemented in a visualisation component embedded in a framework for coordinated presentation of temporal data. It is demonstrated using authentic communication data from a military exercise and a rescue operation.