Some of the operational modes include:

• Echo repeat mode
  The Sonar Training Target (STT) will for the sonar sensor look as a submarine travelling with the speed of the platform and with a maximum target strength of 20 dB, which is a typical medium size submarine.
  
  
• Store repeat
  When a sonar ping is detected by the STM, a pre-recorded echo is repeated. This mode gives the facility of full output power with no "sing around" problems, and a target strength of  up to 40 dB can be achieved.
  
  
• Target highlights
  The echo can be manipulated the same way as a target with finite dimensions will do. Different targets can be defined and stored in a file with different aspect angle. When the platform is programmed to turn into a new leg of its sailing mission, an echo structure representing a different aspect angle of the target can be commanded to the STM.
  
  
• "Passive mode"
  The STM can output pre-stored pulses or pre-stored noise signals continuously or with intervals, and with varying level - either increasing or decreasing. This can be used for identifying a target among other targets, for simulating a torpedo attack or for warning surface ships when surfacing.
   
• UWT commands
  An Under Water Telephone (UWT) can be used for commanding the STT . The UWT commands will be used for escape commands and change of modes only, as the STT shall normally carry out planned missions without interruptions from ships. The commands are relayed from the STM to the mission controller in the platform.​