Olivia switched on the 901. For a few seconds her world was swallowed by blackness as the helmet’s visor slid down. Then screens came on all over the inside face of her helmet, and she could see again. The gloom of the ship no longer presented any obstacle to her pony eyes. Her companions were all outlined in glowing lines, and would stay that way even when they turned on active camouflage. The IFF on the 901 was subtler than a simple radio transmitter, but her visor would be tuned to it.