On 27 April it lost one Ju 87 in attacks on HMS '' Hero '' , evacuating British forces . The Ju 87s also caused the Slamat disaster . StG 77 , with StG 1 , 2 and 3 , sank the Dutch troopship . '' Costa Rica '' ( 8,085 tons ) , '' Santa Clara '' ( 13,320 tons ) and '' Ulster Prince '' ( 3,800 tons ) were also sunk . The Royal Navy destroyers and came to the aid of one another , only to be sunk by other German aircraft
Slamat disaster
Slamat disaster
Sturzkampfgeschwader 77