Ships don’t use NG for fuel.
Some ships are using NG as fuel, and numbers are increasing.
No they use LNG and the new ships have gas turbine engines.
LNG transports use NG for fuel.
LNG carriers certainly do. They are fueled by the boiloff of the cargo that would otherwise be wasted by venting to the atmosphere.
The in-service and on-order fleet of LNG-powered seagoing ships has reached the 200 mark. The double century was achieved on 20 March 2017 when Sovcomflot confirmed orders for four ice-class Aframax tankers of 114,000 dwt at Hyundai Samho Heavy Industries.
The complement of LNG-fuelled vessels that are not LNG carriers comprises 103 in-service ships and 97 on order. The total represents a year-on-year jump of 23 per cent.
Twelve months ago, when LNG World Shipping last carried out a comprehensive review of the LNG-fuelled fleet, there were 74 such vessels in service and 88 on order.
The LNG World Shipping survey breaks the LNG-fuelled fleet into four categories ꟷ passenger ships; tankers and bulk carriers; containers and dry cargo ships; and service and supply ships.
http://www.lngworldshipping.com/news/view,lngfuelled-fleet-hits-200-ship-mark_46977.htm