Two Soviet carriers would reshape an Arctic war

If the Soviet Union had two carriers in 1939, where would they be most useful?

One could support the Northern Fleet and Arctic convoys while another might serve in the Pacific, though that ship would become a prime Japanese target and the programme could fuel a wider carrier race.

Two carriers would provide some availability for Arctic convoy cover if the Northern Fleet could escort and sustain them from nearby bases. One could serve with the Northern Fleet and the other in the Pacific, where the latter would probably face intense Japanese pressure. The mere existence of a Soviet carrier programme would also alarm other naval powers. Germany, Japan, Britain, and the United States could all respond with more carrier construction, turning a Soviet choice into a wider naval arms competition.