Certainly there's no doubt that the boats are getting a lot bigger and they're putting a lot more demands on the port authorities and all the associated partners to try to address them.
Most of the impact has been primarily on the infrastructure side in terms of requiring bigger berth spots, a lot deeper draft, as well as simply the off-loading capabilities. When you have a 6,000-TEU vessel coming in, the various modes are set up to handle that, whereas if you have one coming in that is a 10,000 TEU or a 12,000 TEU, it puts a lot of extra strain on the port and its ability to handle the cargo. From the port authorities' perspective, that has been the larger impact of these larger vessels.
In terms of safety and security, the planning that is done by the port authorities is meant to take that into account when they do the assessment as to whether they can bring the vessels in.