 As with all U.S. Pacific high-altitude nuclear tests, all of the "Operation Fishbowl" tests were completed at night.This is in contrast to the high-altitude nuclear tests of the Soviet Project K nuclear tests, which were done over the populated land region of central Kazakhstan, and therefore had to be done during the daytime to avoid eyeburn damage to the population from the very bright flash of high-altitude nuclear explosions (as discussed in the introduction to this article).According to the initial plan of "Operation Fishbowl", the nuclear tests were to be "Bluegill", "Starfish" and "Urraca", in that order.