Can you tell me please are these positions open to internal bidding before they are open to external applications?
Yes, of course they are open to internal applicants first, it's a seniority based airline. The positions you would be looking at are 777 SO, VANZ 737 FO, ATR FO, F100 FO, or Tiger A320/737 FO. VAA 737 FO spots are 100% going to be filled internally as there are a ton of 777 SO's and VANZ 737 FO's that are coming off type freeze. Take whatever comes up and get on the list, worry about your next move later. The ATR 10% cap looks like it is going to be gradually removed over the next few years if the new EBA gets up, and I'm reasonably sure (happy to be corrected though) that Tiger has a 10% cap on transfers to VAA/VAI/VANZ/VARA positions in theirs. 10% cap = roughly 10 years before you get to go to another fleet, unless it is withdrawn earlier.