Please be advised that Taiwan ENCs (1U) were included in the AVCS database as of week 42/2019
Because the “1U” producer code is not listed as official by the International Hydrographic Office (IHO), the Taiwan ENCs may show up in the ECDIS displayed as "non-ENC" or "unofficial" or produce warnings during installation due to an illegal/unknown producing agency (1U). For compliance purposes the local authorities have stated that this indication can be ignored in the case of Taiwan ENCs.