Talk:General Discussion/@comment-180.56.7.204-20150810134644/@comment-26334968-20150810140422

Oiler is a special type of transport ship designed and built to carry oil (crude oil, petrol or diesel) to replenish ships in harbour or on the sea to extend their operational range. So I think if such a ship will be in the fleet you lose less amounts of fuel and maybe ammo as well with each sortie.