I doubt know if this is what you had in mind but I wrote it a couple years ago after a particularily "interesting" open water weekend in Tobermory....
Ode to the Open Water Weekend.
To Deep Sea Dan, I respond to thee,
Of students and checkouts,
And stinky wetsuits filled with pee.
This weekend of mystery began with a flop,
Our boat was not for Sunday, but a Saturday hop.
Undaunted we left with new things to do.
To do checkouts from the boat and hope we don't hear "I'll Sue"
Rolling and rocking on the waves like a Comet,
Waiting and wondering which students will Vomit!
First to the Niagara to have a good dive,
Whilst the students buzzed, like bees in a hive.
Now, off to the caves weather permitting,
With most of the group somewhat bored and sitting.
Alas, the rocks by the caves, the good W.A. Spears would pinch,
So sadly we turned around and headed to the "Charles P. Minch"
Into the bay at Cove Island, so pretty it looked,
Good seas at last, the students wouldn't be cooked !
Onward and downward, the herd did scramble,
Following the Instructors and Dive masters preamble.
Two by two they came down from the world aloft,
To be told by some instructor-Hey take your mask off !
Air sharing and mask clearing - doing skills by request!
Each of them trying to achieve a personal best.
Buddy pairs swimming ignoring each other,
OH GREAT DIVE GODS! - Will they ever learn to hover ?
One pairs entry was a bit of a miss
As the husbands weight belt - fell into the abyss!
Struggling and laboured, they were having no fun
Their diving careers ended, before they had begun.
With some degree of success, and after quite a chore.
We scoffed up our lunch and sailed off to the "Wetmore".
Oooing and aaahing as they frolicked about.
An adventure they were having, without a doubt.
Then back to the harbour, many grins did abound,
As at last we sailed into Tobermory Sound.
Back to the lodge to carve the roast Beast,
Stories and smiles abounded while eating the feast.
Good Sunday did arrive and to new places we went.
No great worries would come and no one got bent.
With smiles and chuckles and hugs all about,
Our new fledgling divers began to head out.
And off in the distance as they faded from sight,
We heard them say, good diving to all and to all a good night.