[Edit]. YG. No changes are made to how ships move. It is still 3 spaces when launching from a NB and 2 spaces when not. Naval Bases only provide an Operating Radius to Surface Ships … This works as follows:
Ships can stay for an indefinite amount of time inside of operating radius of a Friendly Naval Base. And move OOB inside that Radius. The Operating Radius of a Naval Base is 3 Sea Zones.
If a ship starts it’s turn inside of the Operating Radius of a Navy Base, it may move 2 sea zones in any direction. Therefore, leaving the Operating Radius if desired and going to a MAXIMUM of 5 sea zones away from the nearest Operational Naval Base. (3+2)
If, at the beginning of a turn, a ship finds itself OUTSIDE of the Operating Radius of an operational Friendly Naval Base, it must use it’s movement allowance to move towards an Operational Friendly Naval Base.
------ Let’s look at what this does / / / /
Japan starts the game having a Naval Base in Carolina Islands. This base (as it did in real life), extended the sustained operating range of the Japanese Imperial Navy. They could, in theory, conduct strikes along the coast of Australia from this base. … They could also dominate the seas around New Guinea.
The US had a Naval Base in the Philippines for the same reason. It gave them an Operating Radius along the China Coast and in the West Pacific.
If Japan where to lose their base in Carolina Islands, they would lose their ability to threaten Australia and New Guinea. If USA where to lose their base in Philippines, they would lose their ability to threaten Japan and the money islands in the south.
This is why Japan took the Philippines. … This is also why USA launched attacks on the Carolina Islands after the Battle of Midway.
By making Naval Bases do what they are actually supposed to do in real life, Provide a base of operation for Navy Fleets and to Extend the Range of your Naval Fleets, you make a much more accurate model of the War in the Pacific … and you also stay within the OOB rules of Axis and Allies. …
In SUPER SHORT … You “tie” your Surface Ships to Naval Bases. They literally have an elastic leash. The leash starts to pull back once a ship goes beyond 3 sea zones. The leash hits it stopping point at 5 sea zones.
Want to extend the range of your Naval Fleets?? Build (or capture) additional Naval Bases further out.