Advanced Environmental Group (AEG) wants to know to why Pacific Tugboat Service (PTS) will not return a seized barge holding its emissions control equipment.

California-based AEG has attained a 26 November court hearing ordering PTS to explain why it need not release the vessel, which owner PTS arrested on the grounds that AEG, the charteree, allegedly stole it.

AEG said it does not dispute that PTS is the registered owner but says the vessel has $10m worth of proprietary emission control equipment (AMECS) that it needs to run its business.