The problem for Liz's is that while you are up high and there is reasonable cover there a limited view of the car deck where the man is hidden. However, She should be able to see him if he approaches the landrover.
Also, note just behind the bridge is the cafe/seating area and there are also people standing just a few feet away some of who are now starting to pay attention to what is going on in the wheel room.
See image of ferry
NB inyour situation while your located in the same place as the landrover in the picture there is another vehicle (small box van) between you and the ramp.