The correct spelling of the phrase "gat off course" is actually "got off course". The phonetic transcription for this word is /ɡɑt/ for "got" and /ɔf kɔrs/ for "off course". The mistake in the original phrase could have been caused by a typographical error or a misunderstanding of the correct spelling. It is important to use correct spelling and phonetics in order to effectively communicate ideas and avoid confusion.