COSCO's intra-European subsidiary Diamond Line will extend its current Piraeus-Naples Express (PNX) service into a new butterfly service centred around Piraeus that will include calls at the Ligurian Sea ports of La Speia and Vado in addition to Naples on one leg, and a separate leg connecting Piraeus to the Marmara Sea ports of Izmir, Gemlik and Derince (Safi). The extended PNX service will start from 2 June 2023 with the existing 1,560 teu TAICHUNG with two more ships, the 1,698 teu A. OBELIX