KMAC - Most of our AC are more 38.5 than 38. It was the TCAS/TAWS mod that pushed it to that. I use 38.5 as my personal rule and use that example when I am teaching the rule. Do you guys run into the rule of 11 often? I've only really seen it when doing the long OEF hits out of OBBI and I don't feel like using a dirt runway in Pakistan as a divert w/DV's. Next closest runway is 250nm away.
Usually it only occurs on cruise. And it's not just the long hits that will get you there. Sometimes you'll take some engine parts, or something heavy, and will bump up your zero fuel weight to the point where you may have only 3K left to bingo. Perhaps the weather is crappy from where you're taking off and that +1000 lbs for IMC gets you close. Case in point: diverting to Kadena from the boat when it was only 150 miles away. We had been packing the CODs so much that when we dumped down to OTB weight, we'd get just one pass at the boat.