 This was deemed necessary because World War II replenishments had to be scheduled well in advance due to communications problems and were subject to change due to weather or combat related reasons.On top of that the Underway Replenishment Groups of that time were slow and unwieldy.After experimenting with this "replenishment oiler" concept with the German war prize (placed in service as ), the US Navy's solution to these problems was to create a multi-product station ship, which resulted in the construction of the "Sacramento" class.