This report is the final deliverable of the DRDC-Control Architecture for Multiple Autonomous Unmanned Vehicle Operations prepared under Contract W7714-115079/001/SV. This project addresses the topic of a decentralised world model service that operates across multiple underwater vehicles. This document focuses on field trials performed in Loch Earn, in November 2012 and follows a previous report documenting the simulation results. Despite some technical problems related to modem use, especially with the REMUS vehicle, the decentralised world model service has been successfully demonstrated.