I went through it in 1965 on the USS Jamestown, it was an entirely different experience than going through the Suez Canal. The design of those locks is impressive. We did pull into Panama City for a liberty call, but for portions of the transit we had to stay below deck or stay in the hatchways so that we could quickly duck for cover. There is something about Canals that seems to periodically inspire bad guys to take pot shots at passing ships. Panama City was a short but fun port call.