Force Z, hindsight, and Japanese naval capability

Did racist underestimation of Japan and faith in shipboard antiaircraft fire explain the Force Z decision?

Only partly. British officers had substantial evidence of Japanese naval ability, Force Z expected land-based air support, and failed communications helped prevent that plan from working.

Racist underestimation of Japan and confidence in shipboard antiaircraft guns do not fully explain the decision to send Force Z. A number of senior British commanders understood the danger, while the Royal Navy knew Japanese naval quality through earlier cooperation, the Battle of Tsushima, and decades of observation. Force Z was also supposed to coordinate with land-based aircraft rather than rely solely on shipboard defences. Radio silence and the failure to break it disrupted that arrangement. Delaying aircraft carriers against Admiralty advice reflected politics more than an unavoidable industrial exchange with destroyers.