You can't be serious with this.

"Hide the ship" means:

    All I see is open ocean, sir!

"Difficult to ascertain its class, speed, and heading" means:

    I don't know what kind of ship that is, sir! Nor do I know
    what direction it's traveling in! Hell, it's hard to see how
    fast it's going as well, sir! But I do know this, sir, there's a
    ship there.

But I think you're smart enough to figure that out.