Lt Col Newman aboard the MGB need not have landed, but he was one of the first ashore. One of his first actions was to direct mortar fire onto a gun position on top of the submarine pens that was causing heavy casualties among the commandos. He next directed machine-gun fire onto an armed trawler, which was forced to withdraw upriver. Newman organised a defence that succeeded in keeping the increasing numbers of German reinforcements at bay until the demolition parties had completed their tasks.