Unknow grammatical structure...

[isc28240]

I was watching a science fiction film and I remember a sentence that I understood but I don´t know what kind of grammatical structure it was.

"Attention, attention, our ship is to make a modular transformation in 1 minute..."

My problem is with "our ship is to make..." What the letter "to" is used between "is" and "make"?


Would you explain me what kind of grammatical structure is it?

Thank you in advance.
Have a good day.

[susiedqq]

"Attention, attention, our ship is (going) to make a modular transformation in 1 minute..."