British planners expected powerful Japanese torpedoes

Could Japan spring a decisive torpedo surprise as a British fleet advanced toward its bases?

Possibly, but Britain already expected powerful Japanese torpedoes and had destroyer and light-cruiser doctrine intended to contest night attacks, even before learning the Type 93's full range.

A viewer asks whether Japan could accept the bait of a deliberate British advance and win through surprise. That outcome would have to be tested, but British officers already knew Japan possessed unusually large torpedoes even if they did not know their true range. Royal Navy doctrine placed Tribal-class destroyers and light cruisers such as the Dido and Arethusa classes in positions that could disrupt Japanese destroyer attacks. British access to more exact Type 93 information improved after December 1941, an important timing caveat for any 1942 scenario. A dangerous Japanese surprise remains possible without assuming British planners were ignorant of the weapon or the night-fighting threat. The result would depend on incomplete intelligence, doctrine, and screening forces rather than a predetermined ambush.