In RL the subnets would be moved by harbour units
In SH3 they stay in place
For 2 depends
GWX starts no ships from directly inside the ports as no real space to do so for convoys so they start close outside
WAC say theirs start inside the harbour but not noticed that on the campaign layers
Besides SH3 wont spawn RND units within 25km of the player so you could sit outside all war and never see one leave
Move over 30km outside the port and the units will spawn and move
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