09 Jun 2021 (Last Updated June 9th, 2021 12:28) The testing aims to observe the efficiency of the application in handling the dry-dock processes. Share Article J T Essberger signed up for a pilot agreement with VesselMan. Credit: VesselMan. European parcel tankers and dry cargo vessels operator John T Essberger is ready to commence the testing of the VesselMan software system during the upcoming Ursula Essberger’s dry-docking. The testing aims to observe the efficiency of the application in handling the dry-dock processes against the existing setup. In November last year, J T Essberger and Stolt Tankers formed a joint venture (JV) named E&S Tankers.