Such a small port but major hub in recent years to avoid customs in Antwerp and Rotterdam.
Flushing in NYC is named after Vlissingen.

Five arrests after 2,598 kilos of cocaine were seized in the port of Vlissingen
Customs intercepted 2,598 kilos of cocaine during a check in the port of Vlissingen on Thursday. Five men were arrested on suspicion of involvement in the smuggling. The Public Prosecution Service reported this on Friday evening. During an investigation by the Seaport Police, the drugs were discovered by Customs in several pallets of fruit from Ecuador.