Hiroshima/Kure Port Size Expansion Problem

[Knyvet]

I'm analyzing which Japanese ports should be expanding at the start of the campaign and was considering expanding the port size at Hiroshima/Kure (it's per turn troop and supply ship load rate are 3 times better than anywhere else in the region, but its resources/fuel/oil ship load rates lag behind three larger bases in the region that have port size 10).

However, the expand port option is greyed out for Hiroshima/Kure and I cannot figure out why. [&:]

The port size is 9(9), it has supplies, and it has engineers.

I searched, but could not find an explaination in the manual or via Google search of the forums (rule #1 for new players, use Google to search the forums instead of site's search function).

Arigato.

[RalfBHV]

Port Size 9, is the maximum you can build.

[wdolson]

Port or AF size 10 can only come from pre-game setup.  It represents facilities that were built up over many years pre-war and are beyond what would be done in a wartime emergency.

Bill

[Knyvet]

thanks - ref. Manual Rule 9.2.2 (sizes range from 0 to 10 and can be up to 3 levels greater than their SPS, but cannot be increased byond 9).