Read the following from tkd:

{jay'} "intensely"
This word not only intensifies whatever is being said, it
turns the whole phrase into an invective. Alone among the
adverbials, {jay'} always comes at the end of the sentence.
{qaStaH nuq jay'} "What the #$*@ is happening?"
{mIch 'elpu' jay'} "They've entered the #$%@ sector!"

Now I ask..

A klingon ship is traveling and suddenly picks up the following transmission:

{jabbI'ID bojemchugh, vaj mIch bo'elpu' jay'}

Where does the {jay'} refer ? To the {vaj mIch bo'elpu'} only ? Or to
the whole phrase {jabbI'ID bojemchugh, vaj mIch bo'elpu' jay'} ?

Using jay' is virtually identical to saying damn it at the end of an English sentence. If you detect a transmission, then you've entered the sector, damn it! To what does the damn it apply?

-- 
SuStel
http://trimboli.name