JamesK
Contributor
Training is always just an introduction to whatever you're final goal maybe. Proficency comes with performance and routine practice of what you where initially introduced to in training. Failure to routinely train will usually result in failure to perform when most needed no matter if the course was last month or last year. Serious cave divers train all the time so when that tank burst seal goes 1000 ft back in dealing with it is routine and everyone gets out safe. Taking a second full cave would depend on cost, usually it isn't cheap.
Which is why I cringe when I see cave divers who only come to the caves once a year or less grabbing stages and scooters and head to the backs of the caves to crawl in the small stuff off the beaten path.