Sha-nenner - In the Naval Nuclear Submarine Fleet, Manuevering (the Engineering control room where the reactor, electric plant, and propulsion are overseen) was kept inviolet. That means that in order to enter Manuevering, you had to request permission to enter. As the Reactor Operator while in port and shutdown, it was my responsibility to maintain Manuevering inviolet. When someone would come up and say, "Request permission to enter!"
I would say, "Enter!" if they had business being there.
Eventually everybody got tired of saying all that out, so we shortened it to "sha-nenner" and "enner".

I would say, "Enter!" if they had business being there.
Eventually everybody got tired of saying all that out, so we shortened it to "sha-nenner" and "enner".