It is very common, particularly amongst Australians, to confuse Tack and Tact in the context of comparing two different courses:

Thus

Erroneous: He took a different tact to me instead of

Correct: He took a different tack to me.

Comparison chart

Tack versus Tact comparison chart
Edit this comparison chartTackTact
Usage Tack refers to direction Tact refers to avoiding giving offence

Definition of Tact

tact : noun

1. a keen sense of what to say or do to avoid giving offense; skill in dealing with difficult or delicate situations.

2. a keen sense of what is appropriate, tasteful, or aesthetically pleasing; taste; discrimination.

Definition of Tack (in this context)

tack1 : noun

1. a course of action or conduct, especially one differing from some preceding or other course.

2. one of the movements of a zigzag course on land.

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