One night, on the way back from Greece, Leo got slightly lost. This caused a lot of worry for all the demigods on board the Argo II. So they ended up on the deck, trying to find the right direction using the stars as guides.
Surprisingly, Percy was the one who got them back on course. He'd managed to find the newest constellation, the Huntress. Whose bow shot a shooting star that had pointed them in the right direction.
No one else had noticed, but Zoe Nightshade had once again saved them all.