The use of LNG as ship fuel has now started with ships on regular trades. An increasing number of ships on tramp trades i.e. when the ship does not have a fixed schedule or published port of call are using LNG as fuel in Northern Europe, where access to LNG can be provided by LNG bunker suppliers. "Safe" in an health, safety and environment (HSE) sense, "reliable" from the ship owner's perspective as the owner depends on fuel supply in the quantity and quality as needed at a location where needed and at a time when needed.