Can someone explain to me how vacancies work like I'm 5 years old? For example, I'm looking at 2406V...the announcement did not have any SFO787FO openings yet the award has 10 awards for SFO787FO. Is this because potentially 10 SFO787FO's bid to other equipment on the vacancy which then opened up their spots? If this is the case, if you want a certain position should you bid it every single vacancy regardless of whether it's on the announcement or not?