Following a UN report on North Korean vessels spoofing signals to hide their identity and conduct shipments in violation of sanctions, a new report published Wednesday sheds light on the methods used to trick the international tracking system.

The report, published by the Royal United Services Institute (RUSI) as part of its Project Sandstone series, delves into the case of the North Korean vessel Tae Yang and its attempts to spoof its identity as the Mongolian-flagged chemical tanker called the Krysper Singa.