Stralsund and Rostock, 9–10 December 2019. During a partner meeting to determine the next steps in the development of a green ammonia propulsion system for an inland vessel, we visited a number of sites, including the engine room of the Warnow ferry F‑Warnow (operated by Weiße Flotte GmbH) in Rostock. The industrial port and the Yara GmbH & Co KG ammonia storage facility are located nearby.