I remember many times when my ship (USS Peleliu) was making that turn into San Diego Harbor.
We barely made it under the Coronado Bridge.
Back then, if it was your final WESTPAC before your EAOS, you'd throw your white hat over the side when passing under that bridge. If it floated, you got bad luck.
Mine was filled with bolts. Sunk right to the bottom!
I wonder if that's still a tradition.