You be the judge, me, I leave mine at home or in the car. I didn’t see the “detailed list” online, I’m sure someone will link it..
from Celebrity
Weapons, Explosives or Other Dangerous Items Prohibited
A detailed list of prohibited items is located on our website(s) and incorporated by reference.
No weapon, ammunition, explosive, firework, or other item that presents a risk of harm to persons and/or property is permitted onboard. The determination regarding items constituting a risk of harm to persons and/or property is left solely to the discretion of Celebrity Cruises. Items not permitted onboard will be confiscated by the ship’s Security.
Firearms and other weapons are not allowed onboard. Guests who declare, to the ship’s personnel, the presence of a firearm or other weapon on their person or in their luggage will be given the opportunity to dispose of it prior to boarding. Guests who fail to declare the presence of a firearm or other weapon may be denied boarding or removed from the ship. Items such as dive knives must be reported to the ship’s personnel at the time of boarding. Such items may be permitted onboard but held in safe custody by the ship's Security staff when not in use ashore.