Definition of cross the T in English:

cross the T

phrase

historical
  • (of a naval force) cross in front of an enemy force approximately at right angles, securing a tactical advantage for the firing of guns.

    • ‘At Leyte on 24 Oct 1944 he made fame at the Battle of Surigao Strait by "crossing the T" of the oncoming Japanese surface fleet.’
    • ‘Probably the most famous battleship fight decided by crossing the T was the Japanese victory at Tsushima Straights in the Russo-Japanese War.’
    • ‘He could easily outmaneuver the Russians and use tactics to cross the T twice, inflicting maximum damage on the slower Russian fleet.’