Australia could return to operating submarines before 1942 as Japanese naval capabilities grow. Supplying submarines would also offer Britain a convenient way to place forces farther forward. The same regional comparison raises doubts about leaving Singapore's defences unchanged once Yamato's characteristics become known. Additional preparation therefore includes bases and defences as well as the ships themselves.
Notable Point · 1:33:30-1:34:23
Japanese naval growth could revive Australian submarines
A stronger Japanese fleet could encourage an Australian submarine force and renewed attention to Singapore's defences.