“Having the deck” means you are the Officer of the Watch. In plain language your in charge on the bridge.
OOD qualification is a demanding process and not given lightly by a CO. He is trusting you with his ship, his career, and the lives of his crew.
"Ceterum censeo Islam esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
Okay, thank you.