I think the 3rd triangle was for the IFF interrogator upgrade (which, AISTR, seriously b**ggered the radar performance). This removed the old strike/attack functionality completely.
Certainly, when we first went down to the FI we were only and specifically allocated Phase 2 upgrades, even though Phase 3 aircraft were available, and I often wondered why they wanted attack capable aircraft down there when we did not have the weapons, the weapon carriers or the right training. In fact we were always told that if the strike lights came on, to keep pressing the mode switch until they went out.
Personally, I got hold of an old strike checklist and made an effort to understand the strike moding and found the system to be really good for radar fixing and low level nav by putting the LCOSS over the radar waypoint. Pretty good for radar approaches as well. Phase 3 kicked that on the head.
Last edited by BSweeper; 3rd Nov 2013 at 21:44.