tac situation map 1: 0400-0430, Nagumo launches search aircraft along NE/SE arc, then 107 fighters, dive-bombers, torpedo-bombers @ Midway; Fletcher sends VS-5 out on westward search; 0530-0540, Midway-based PBY’s spot 2 Japanese carriers and incoming airstrike; Midway immediately launches 24 defensive fighters, 10 torpedo planes, 17 heavy bombers, and 27 dive-nombers; 0640-0700, Japanese brush aside Marine fighters and hammer Midway, while Fletcher orders Spruance’s carriers to turn into the wind and launch all strike aircraft on vector 240 degrees; 0710, Midway torpedo- bombers begin attack on Japanese carriers