That's exactly right: at designated docks, there are probably no illegal landings; illegal landings take place at undesignated docks.
These people have certain ways of doing things. For example, one boat will dock alongside another boat to transfer the crab. The other boat will then leave for an undesignated dock. That's how illegal landings are made. People can also go close to shore and place the goods in shrimp bags, which they will collect later. So there are several ways to make illegal landings.
We even heard there might be collusion with crab processors. One of my harvesters told me that if he went to a certain spot, 50% of his catch could go under the radar. He refused the offer. However, with a large quota like that, if there are several fishermen, 50% of the total catch can be landed illegally. To do that, you need to partner with a fish processing company.