The Germans have no destroyer present, therefore the defending air units can not hit the sub, and of course the sub can never hit planes. Think of it in terms of the combined arms rule, air units can only hit subs if they are combined with at least 1 participating destroyer, the difference with this particular combined arms is that it works while attacking and defending. In the scenario that you described, the sub would destroy the remaining transport without rolling and the defending fighters can do nothing.
Question on Convoy Disruption rule
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As far as I understand this rule, does it mean that Japan could do Convoy Raiding in SZ 19 against China or Russia for up to 3 IPCs if either of them get hold of Manchuria?
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China can’t be convoyed, but you should be able to convoy 3 IPC’s from Russia.
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Are you sure that China can’t be convoyed?
All those Kiangsu (3 IPCs), Shantung (2 IPCs) and Jehol (1 IPC) are also adjacent to SZ 19.
6 additional IPCs which can be also ripped off Chinese purse. -
Unlike the other powers in the game, China is not an
industrialized nation and has a rural economy and
decentralized government. As a result, China does not have
a capital like other powers do. If all Chinese territories are
captured by Japan, China retains its unspent IPCs in hope
of liberation and does not give them to Japan. In addition,
China may spend IPCs only to purchase infantry units
(with one exception, see below) and does not use industrial
complexes. New Chinese units can be mobilized on any
Chinese territory that is controlled by China, including
those captured in the current turn. If a Japanese industrial
complex is built on a Chinese territory and that territory is
later recaptured by the Chinese or liberated by another Allied
power, the industrial complex is removed from the game.
China is not subject to convoy disruptions (see “Conduct
Convoy Disruptions,” page 22). -
China can’t be convoyed, but you should be able to convoy 3 IPC’s from Russia.
Thanks for the rule quotation.
This means that it is not possible for Russia to be convoyed from SZ 19 via Manchuria (which would become a chinese liberated TT) but only SZ 6 via Korea (3 IPCs).