The water was blood warm and pool clear while lacking any discernable current. The cliff and the 8 foot long stalactite before me was formed eons ago of a light-grey limestone which reflected the intense Caribbean sunlight, channeled down to us by the vertical walls. The illumination gave us the false sensation that were not very deep and safe, but in reality we were passing the 110 foot mark as we plunged deeper into a geological feature which has claimed the lives of many well trained divers before our attempt. The dangers of the dive were starting to become apparent and they had nothing to do with the 6 foot long reef sharks circling above and below.
As an 11 year old boy growing up in Burlington Ontario Canada, I was fascinated with the sea, a condition brought on by faithfully watching the television series, The Undersea World of Jacque Cousteau. One particular show that stuck with me was Cousteau’s documentary account of diving and exploring the Great Blue Hole of Belize. Then known as British Honduras.

Half Moon Cay.
As a pre-teen, I had not heard of nor understood the concept of a “Bucket List” but apparently I had unknowingly started one as I had decided then I would dive the Great Blue Hole, but I could not imagine at the time that I would have to wait 54 more years to do so.

Maiatla at anchor at Half Moon Cay
The Great Blue Hole is a large marine sinkhole. It lies near the center of Lighthouse Reef, an atoll 42 miles from the mainland and Belize City. The hole is circular in shape, 1000 feet across and 400 feet deep. When the seas levels were much lower, rain water permeating the ground for millennia, eroded the soft limestone to create a massive cavern. After the last ice age the sea levels rose to flood the coastal shorelines. The ceiling of the now submerged cavern collapsed, creating a perfectly round sink hole.

Stephanie admires our anchorage and the crystalline water Half Moon Cay
In March, three friends joined my sailing vessel, Maiatla for a little fun in the sun sailing cruise of Belize with the focus of venturing out to the Great Blue Hole. On board was an old sailing buddy Marina Sacht, her sister, Adriane Polo and her daughter, Stephanie Sykora. Stephanie was an avid diver and when I suggested we team up to dive the Great Blue Hole, she was all in.

Adrian and Marina, best crew ever!
We arrived and anchored off of Half Moon Cay, dropping the hook onto a glaring white sand bottom. Half Moon Cay is a national park, and one of the cays that boarder the perimeter of the massive atoll. We wasted no time in heading ashore to announce our arrival to the park rangers and to pay our fee that would permit us to visit the Blue Hole. At $10 USD a head, it was a bargain. Aside from the rangers, the park was deserted giving us free rein to explore. At the small and dilapidated visitor’s center, there was a cross-sectional artist rendering of the Blue Hole. The hauntingly cathedral-like structure was almost mind numbing.


Sign on the wall at the visitors center.
Our group asked many question about the Hole, but is was Adriane who asked about the presence of sharks around the atoll. The ranger, a middle-aged fellow of Mayan decent, smiled and seemed too please to share what he knew.
“Oh yes we have lots of sharks, Grey and Black Reef sharks, Hammerheads, Bull and Nurse Sharks.” He paused for dramatic effect before adding. “But don’t worry, we haven’t have a shark attack in over two years.” Again he paused to gauge our group’s reaction. I believe it was Adriane who queried further about the attack.
As recounted by the ranger, he said. There was a group of divers who had returned to the boat after a successful dive. To add some excitement to the experience, the tour group operator began chumming the water to attract sharks which quickly turned into a feeding frenzy. He said that a woman decided to jump back in to swim with the feeding sharks. Subsequently she was attacked and lost a leg.
I performed an internet search and found this. “A 15-year-old girl named Annabelle …. suffered a serious shark bite in Belize’s Blue Hole in August 2024. She lost her leg in the attack and had to be airlifted to a local hospital. The shark was reportedly a reef shark, about 6 feet long, and the attack occurred after she finished a scuba dive tour with her family.
Doesn’t sound like the same event as the details are so different. But it is unlikely we are talking about two separate events and we will probably never know the truth. Either way, the story unsettled Adriane as the following day I was planning on taking her daughter deep into the same hole with the same sharks.

Andy and Stephanie walking the beach at Half Moon Cay
We spent the rest of the afternoon exploring the island’s pristine beaches and hiking trails meandering through the interior to visit the nesting colonies of Boobies and Frigate birds. We ended the day by taking a swim off the sandy beach at the west end. It was a beautiful spot and the heat had us all done in. It may have been the shark attach story that kept Adrian out of the water while the rest of us waded into the shallows. If anyone thought Adriane was just being a bit paranoid, well that thought would have quickly vanished as moments later, Stephanie called out as she stood in waist deep water. “A shark! A big one right in front of me!” I quickly headed over to where she was to see what type of shark it was, but I needn’t had bothered because after nearly colliding with Stephanie’s legs, the shark turned to bolt at high speed and directly at me. Standing fast, I watched as a frightened 5 foot nurse shark shot past.

Island hiking trails



Frigates over head

Swimming Beach at the west end of Half Moon Cay where Stephanie encountered the shark
Back aboard Maiatla that night we watched as a full moon rose from the east and over the following 8 hours, the moon vanished only to reappear as it went through a full lunar eclipse.

Sunset in the Lagoon.

Sunset swim as the Moon began its full eclipse.
The following morning was beautiful, cloudless and azure. After breakfast we made preparations to get underway. We were soon weaving our way through the reef and bommie-strewn atoll on our way to the Great Blue Hole. Our goal only lay approximately 7 miles to the north. This would be my third trip into the blue hole so I was fairly confident as to my route, but I still took extra persuasions by placing Stephanie up on the bow, armed with a radio to stand as a lookout. By 10am the sun was high and off to our starboard so we had a good view of what lay beneath the surface.

Stephanie with Radio on Bommie watch.
We navigated through the reefs reaching the Blue Hole without incident and easily took aboard the large mooring line that was set for the big dive boat, The Aggressor. Fortunately, it was the weekend and the Aggressor was not due back until Monday.

Off to dive the Great Blue Hole!
Stephanie and I wasted no time in suiting up and took the dinghy to the far side of the Blue Hole where there was a diving buoy to which we could moor. This would only be my third dive with my new partner and previous to this trip, it had some years since her last dive so I would have to pay close attention to her, in case she got into trouble. After completing our pre-dive checks, we rolled into the water.
The anchor, which consisted of a bolt embedded into the coral lay 40 feet below, just a few feet from the edge of the deep drop off. The visibility was excellent giving us a view of the schools of fish milling about the coral perimeter. On the bottom we peered over the vertical edge giving us our first good look at the deep abyss. We could see down perhaps another 80 feet or so but then the waters turns black. I gave Stephanie the all ok sign, without hesitation she smiled behind her mask and repeated my hand signal. With that, we launched ourselves headfirst over the rim. The wall was vertical, but rugged from having large chucks of limestone breaking away. As we descended, I noticed that there appeared to be a near constant avalanche of coarse coral sand cascading off the edges which was often caught by tiny ledges and shelves. This white sand helped to reflect the penetrating sunlight from above.

Stephanie checks her gauges as she hovers on the lip before we dropped into the great abyss.

The rugged wall of the hole is covered in course coral sand which reflects the light.

the wall at 90 feet with some colorful soft corals under a ledge which protects it from the cascading sand from above.
There was very little marine growth on the wall, which I presume was due to the scouring effect of the abrasive sand as it migrated towards the bottom. From a depth of approximately 100 feet, the surface appeared as if it were a mirror or even a giant moon suspended above. I stopped our decent a couple of times to have a face to face with Stephanie to make sure she was ok and to see if I could detect any signs of narcosis. Normal air, for all practical purposes is 21% oxygen and 80% nitrogen. At depth, a diver can experience Nitrogen Narcosis a condition is caused by the large concentration of nitrogen which creates a drunken affect, instilling a sense of euphoria with the retardation of senses, mostly common sense. Onset can begin around 100 feet and start becoming acute around 130 feet.

What appears to be the moon shines from above

Our last stop, the ledge.

The ledge with a coating of coral sand.

A celebratory selfie while sitting upon the ledge. Notice the clarity of the water.
Aside from her constant broad grin, she seemed fine. Keeping within arm’s reach, we descended further. Directly below me I spotted a large ledge, perhaps 3 feet wide and 20 feet long and what struck me was that at one end appeared to be a massive stalactite clinging to the cliff face. We disturbed the sand on the ledge as we landed, causing a mini avalanche to flow over the edged. On our knees, we glanced about. The tranquil scene was surreal. Shattered shards of light sliced down to us from above, piercing our escaping air bubbles as they shot back to now unseen surface.
Above and below was the silhouettes of a circling sharks. Apparently paying us no heed. The only sounds were our breathing and rush of fleeing bubbles. When I held my breath, I could hear my own heartbeat. I had been constantly monitoring our depth and when I did a final check while on the ledge, my gauge read 150 feet.

I point out to Stephanie a thrasher shark circles above

A total of 6 sharks were spotted during our dive, but all at a distance.

An ancient stalactite clinging to the wall.

Not my photo but it gives a better perspective of the stalactites.
It was there on this ledge that it finally occurred to me why this dive had claimed so many lives. By all accounts it was an easy dive, too easy. Straight down while clinging to the safety of a wall, no discernible current, abundant lighting, great visibility and warm, soothing water. The whole experience gives you the illusion that you could just carry on down to the unseen bottom. And when you inject the Nitrogen Narcosis factor, that illusion can easily turn deadly. Other factors also can come into play in the form of inattentive dive masters or trying to watch too many divers’ with various diving skills. Old and improperly serviced rental dive gear has also been factors in some of the deaths here as my research showed.
As a former commercial diver on the Artic oil rigs, I was very familiar with my own limits concerning narcosis and comfortable working at depths up to 330 feet. So I was hyper-focused on my charge and dive buddy Stephanie, who by all accounts was doing fine as she took in the sights from our perch.
Five minutes was all we had at this depth. Stephanie was our official time keeper and when she tapped the face of her watch, it was time to start our slow assent.

Stephanie begins her accent from the ledge.
After inflating my bouncy compensator with a little air to assist, we began to fin our way up on a diagonal line so we could explore more of the cliff on our way up. We performed several switchbacks so we would emerge from the hole approximately where we had entered. On our accent we again noted the lack of marine life below the rim. The only exceptions being a pair of spiny lobster sitting boldly upon a tiny ledge. My first though was to rescue these poor creatures before they fell into oblivion, but when I approached they declined my help so I let reluctantly let them be.

A pair of friendly lobsters.
After topping the rim with still forty feet of water above. I moved us up to our first decompression stop. Checking Stephanie’s and my remaining air supply, I was pleased to see that we both had ample air so we spent the next 17 minutes decompressing and exploring the upper edges of the reef.

After dive Hi five.

The newly anointed Blue Holers return.
Another tick on the bucket list. I will dive the “Hole” again, but that will have to wait till next season as Hurricane season was fast approaching and it was time to start thinking about heading back to the Rio Dulce in Guatemala.






























































































































