I would imagine the illegal shipping activity they are mainly targeting is the bypassing of sanctions. For example oil being transferred between tankers on the

I would imagine the illegal shipping activity they are mainly targeting is the bypassing of sanctions. For example oil being transferred between tankers on the high seas and then shipped into North Korea. https://www.reuters.com/article/us-northkorea-missiles-russia-oil-exclus/exclusive-russian-tankers-fueled-north-korea-via-transfers-at-sea-sources-idUSKBN1EN1OJ https://www.reuters.com/article/us-northkorea-missiles-russi...