Around 4:30, when Alicia goes out to the boat deck to see the city, there are moving cars on the left of the landscape on a highway.
Approx halfway through when Alicia and Jack are looking at boats on the radar, Alicia points to the radar which shows them being a good distance from shore (the land being the green). Since they were on dry dock, the center of the radar should have been where the land meets the water.