Well, considering the title is 'The Phantom Menace', and one of OB1s first lines is "I sense something elsewhere, elusive" shows OB1 to be right on the ball. The 2 Jedi are on the same ship as the Trade Federation Viceroy, who is in league with a Sith. The 'elusive' element is the Sith. Qui Gon, also in close proximity to the Viceroy cannot sense anything. Surely he should be able to sense something even if he is concentrating on the 'here and now'. I have always thought this scene shows Qui Gon to be incompetent in his awareness. Indeed he is concentrating on the here and now, but he is missing the bigger picture. OB1 is the more astute and therefore, more cautious one, and is proven right when the Viceroy orders the gassing of the Jedi.