part or parts?

The context in which it appears is needed in order to comment on the correctness of the original sentence.

john liaoThe main skills you need for sailing, I suppose, erm, two part?

This is not coherent. Changing 'part' to 'parts' can't save it, either.

The whole context comes from a dialogue:
I started sailing when I was nine in my local sailing club that's in my home village in Ireland. Erm, I've been sailing pretty consistently ever since. Erm, I sailed all the way through my teens. I managed to be lucky enough to sail in countries all around Europe. Erm, I've done it, er, for my university, I did it for, erm, my country a few times. The m

Is this a transcription of an audio recording? If so, transcribe just what you hear. If the speaker said "part", write it as "part". Normally, it's "two parts". That should be obvious. But if you are supposed to be transcribing exactly what you hear, then you'll have to transcribe the speaker's mistakes as well.

CJ

john liaoThe main skills you need for sailing, I suppose, are erm, two part. It's a there has to be a mixture of, er, the physicality and the mental approach.

What we are getting grammatically, I suppose, is an adjective: 'two-part'. Each skill is a two-part skill. He would have been better to use 'two-fold'.