Returning from a photo recon mission, the first jet to land fails to catch a wire and is stopped by the barrier netting, which is damaged. Without this barrier netting, the parked aircraft on the forward deck are at risk of damage if the second jet overshoots its' available landing area.
To prevent this, the deck crew places "Tilly" (the mobile crane/lift) at the end of the available landing area as a last barrier between the incoming jet and the forward parked aircraft. The second jet is low on fuel and must either land or ditch in the ocean.
