Yes, indeed - if the aircraft is in your field of view and isn't changing position as viewed through the canopy or windshield, you're on a collision course.
Not my statement, but I know what was meant. Perhaps five words can be added to clarify the intention which now reads:
Yes, indeed - if the aircraft
is in your field of view and isn't changing position as viewed through the canopy or windshield,
and it's increasing in size, you're on a collision course.