Right. This is also possible for us, but the engineer needs to go to the engine room and bypass the throttle system and take manual control of the engine manage

Right. This is also possible for us, but the engineer needs to go to the engine room and bypass the throttle system and take manual control of the engine management computers to give throttle inputs to each engine. If these computers fail but somehow the engines are still running I know we can mechanically take each engine in and out of forward and reverse gear. In either of these cases throttle orders would go through the intercom or would be manually relayed by shouting along a human chain if the intercom is out. We can also take manual control of the rudder if the steering hydraulics fail, by rigging two sets of block and tackle to an emergency steering tiller. We practice these fairly regularly in drills and I can say that close quarters manoeuvring with manual control of the rudder is not something you would want to do with an inexperienced crew for real!