|Known counterpart stations||E07, G07, S07, V07, M12, XP, XPA, XPH|
XPA2 operates in regular schedules of three identical transmissions, spaced 20 minutes apart. The frequencies of the subsequent repeats usually decrease, sometimes increase, in most cases by about 1-2 MHz.
XPA2 messages consist entirely of 5-digit groups, beginning with a 3-group header. The purpose of the first and third groups are unknown, but the second group is the group count minus three. The first digit of the first group is always zero.