They dropped a LOT of bombs on her while she sat in one spot.
The demonstration wasn’t all that convincing. In fact, it may have had the opposite effect as naval planners concluded that maneuvering ships were unlikely to be destroyed by aerial attacks.
Unfortunately for the Prince of Wales and Repulse, technology advanced in the next 20 years.
“Unfortunately for the Prince of Wales and Repulse, technology advanced in the next 20 years.”
The same could be said of Pearl Harbor and the battleships, cruisers, and destroyers either sunk or damaged in a ‘safe’ harbor.
It was suicidal to send them out without air cover, but their Admiral thought destroyers with their (inadequate) AA was protection enough. When they reported being under attack, he called for more destoyers.
Torpedoes got 'em that time. The typical maneuver to avoid torpedoes was to "comb the wake" - turn in the direction the torpedoes were coming from.
The Japanese Naval Air Arm were trained by the Brits and were crackerjacks. They launched their torpedoes from right-angle directions, so all the Brits could do was brace for impact.
[Sidebar] I always thought that those guys (especially the Marines**) were the unluckiest survivors of the war. First their ship was sunk, which usually meant rehab behind the lines, and instead they were in Singapore just in time for the surrender. Then they were put on the murderous "Bridge on the River Kwai" prisoner labor project.
** Their battle station were as below decks shell handlers. They didn't get the Abandon Ship command as the communication system was out. One of the Prince of Wales guys said he got out before she capsized because he looked up the shaft and saw that no one was unloading the shells they sent up, so he and his buddies got out of Dodge FAST - and lived - just in time to be sent to the River Kwai.