Ship-to-ship bunkering can take place at different locations: along the quayside, at anchor or at sea. It is the most common bunkering method used for bunkering seagoing vessels with HFO and MGO. The capacity of bunkering vessels can range from 1,000 to 10,000 m3. Because of size limitations in some ports, only smaller bunkering vessels will be able to operate in the port area.
Compared with other bunkering methods, the flexibility of ship-to-ship bunkering is high with respect to capacity and bunkering location. Because the bunker vessels are moored alongside LNG-fuelled ships, this bunker method could permit simultaneous cargo handling if approved by the relevant authorities, such as the port authority.