This is the 12889th most frequent Turkish word.
jetlerine
"To their jets."
The word 'jetlerine' here implies possession ('their jets', referring to the jets owned by someone).
Jetlerine bindiğimizde güvende olacağımızı hissettik.
We felt we would be safe when we boarded their jets.
Usage of 'jetlerine' serves to denote ownership of the jets ('their jets').
Onların jetlerine hayranlıkla baktık.
We looked at their jets with admiration.
In this instance, 'jetlerine' suggests association or relation ('their jets' as relating to the activity).