Some Agonistas, many outside bloggers, and even some newpapers use this incorrect phrase.

When a sailor realizes his vessel is not making adequate progress, he tries something different to fill his sails: he changes tack.

When a Decider realizes his policy isn't working, he tries something different to have a more positive effect: he changes tack.


Let's review Websters:

Main Entry: tack
Pronunciation: 'tak
Function: verb
Etymology: Middle English takken, from tak

transitive verb
1 : ATTACH; especially : to fasten or affix with tacks
2 : to join in a slight or hasty manner
3 a: to add as a supplement b: to add (a rider) to a parliamentary bill
4 : to change the direction of (a sailing ship) when sailing close-hauled by turning the bow to the wind and shifting the sails so as to fall off on the other side at about the same angle as before

intransitive verb
1 a: to tack a sailing ship b: of a ship, to change to an opposite tack by turning the bow to the wind c: to follow a course against the wind by a series of tacks
2 a: to follow a zigzag course b: to modify one's policy or attitude abruptly

Main Entry: tact
Pronunciation: 'takt
Function: noun
Etymology: French, sense of touch, from Latin tactus, from tangere to touch -- more at TANGENT
1 : sensitive mental or aesthetic perception
2 : a keen sense of what to do or say in order to maintain good relations with others or avoid offense
synonyms TACT, ADDRESS, POISE, SAVOIR FAIRE mean skill and grace in dealing with others. TACT implies delicate and considerate perception of what is appropriate . ADDRESS stresses dexterity and grace in dealing with new and trying situations and may imply success in attaining one's ends . POISE may imply both tact and address but stresses self-possession and ease in meeting difficult situations . SAVOIR FAIRE is likely to stress worldly experience and a sure awareness of what is proper or expedient .


Thank you for your indulgence.