I hate to say it but the b24's cracked 66[think it was 66] dar ring, lots of little red dots show up nicely, the heavy fighters showed up in the base to the north's dar ring. I thought it was a cv sneak of 66 until it went out that it was noe buffs....yummy good time was had by all that lifted to intercept. You say you were at 65 feet, from what I was told dont know if it true or not but you have to be under 50 feet not to show up in the dar ring.
EDIT*
just checked the map base 68 the b24's showed in dar ring and 52 for the heavy fighters, I never did see the 3 group on a dar ring, I can only assume they got intercepted at the strats.