What Atlantis Submarines are and how they operate
Atlantis Submarines are tourist submarines that take passengers underwater to view coral reefs and marine life through large windows. Unlike glass-bottom boats that stay on the surface, these vessels submerge completely, allowing you to sit inside a pressurized cabin while the ocean surrounds you. The submarine descends to depths between 100 and 150 feet, depending on the location and the specific tour.
The vessels are crewed by a pilot and a guide who narrate what you see and answer questions during the dive. Most Atlantis Submarines tours last between 45 minutes and two hours total, with roughly 40 to 50 minutes spent underwater. The submarine holds between 48 and 64 passengers, depending on which vessel you board, and seats are arranged so most people get a window view at some point during the tour.
Atlantis Submarines operates in several locations, including Hawaii, the US Virgin Islands, and Cozumel, Mexico. Each location has its own marine environment — Hawaiian tours often feature tropical fish and occasional sea turtles, while Caribbean locations showcase coral formations and reef systems. The company has been running these tours since 1986.
Key Takeaways
- Atlantis Submarines are fully submerged vessels, not surface boats, and descend to 100 to 150 feet where passengers view marine life through large windows.
- Tours typically last 45 minutes to two hours total, with about 40 to 50 minutes spent underwater, and hold 48 to 64 passengers per dive.
- A trained pilot operates the submarine while a guide narrates and explains what you are seeing on the ocean floor.
- Tours operate in Hawaii, the US Virgin Islands, and Cozumel, Mexico, each with different marine ecosystems and seasonal variations in what you might see.
- You do not need diving certification or swimming ability — the submarine is a sealed vessel and you remain dry throughout the experience.
How the submarine descends and maintains pressure
The submarine uses ballast tanks — compartments that fill with seawater to add weight — to sink below the surface. Once the pilot reaches the desired depth, the ballast tanks are adjusted to keep the vessel neutrally buoyant, meaning it neither sinks nor rises. This allows the submarine to hover and move slowly along the reef or ocean floor while passengers observe.
The cabin itself is a pressure hull made of aluminum or steel, designed to withstand the water pressure at depth. As you descend, the pressure outside increases, but the cabin maintains normal air pressure inside — you will not feel squeezed or uncomfortable. The submarine carries enough air for the entire tour, and carbon dioxide is removed by scrubbers in the ventilation system.
To surface, the pilot releases compressed air into the ballast tanks, forcing the seawater out and making the submarine lighter. The vessel then rises back to the surface at a controlled rate. The entire process is monitored by instruments on the control panel, and the pilot follows strict depth and time limits for safety.
What you see on a typical dive
What you observe depends on the location, time of year, and water conditions. In Hawaii, you might see yellow tangs, parrotfish, moray eels, and occasionally sea turtles or reef sharks. In the Caribbean, coral formations are often the main attraction — brain coral, elkhorn coral, and staghorn coral create the structure where fish live. Cozumel tours frequently feature larger fish like groupers and snappers, plus the remains of shipwrecks in some cases.
The guide points out marine life and explains the ecosystem as you move along. Water clarity varies — on clear days you can see 80 to 100 feet ahead, but on cloudy or rough-sea days visibility may drop to 30 to 40 feet. The submarine's lights illuminate the area directly in front of the windows, making it easier to spot creatures that blend into the reef.
Not every dive is identical. Marine animals move, hide, or migrate seasonally. The guide will tell you what is typically seen at that location and time of year, but sightings are never may provide. Some passengers see sea turtles and sharks; others see mostly fish and coral. The reef itself is always there, but the specific animals you encounter change from day to day.
Physical requirements and who should not dive
You do not need to be a strong swimmer or have any diving certification. The submarine is a sealed vessel and you remain completely dry — there is no water inside the cabin. However, there are a few physical restrictions. Passengers must be able to climb stairs or a ladder to board the submarine, and the cabin space is tight, so people with severe claustrophobia may feel uncomfortable.
Pregnant women are typically not permitted to dive, as the pressure changes and the confined space pose risks. People with uncontrolled high blood pressure, heart conditions, or recent surgery should check with their doctor before booking. Ear problems can make pressure changes uncomfortable — if you have a cold or sinus infection, you may want to reschedule.
Children are usually welcome, though age minimums vary by operator. Some require children to be at least 4 or 5 years old, while others have no age restriction. Very young children may find the experience boring or become restless in the confined space, so consider your child's temperament and attention span.
Cost and how to book a tour
Atlantis Submarines tour prices vary by location and tour length. In Hawaii, a standard 45-minute dive typically costs between $100 and $150 per adult, with discounts for children. Caribbean locations may range from $90 to $140 per person. Longer tours or tours that include additional experiences (such as a beach visit or meal) cost more. Prices fluctuate seasonally, with higher rates during peak tourist months.
You can book directly through the Atlantis Submarines website or through third-party tour operators and travel agencies. Many hotels in tourist areas also offer booking services. It is common to receive discounts if you book online in advance rather than at the dock on the day of the tour. Some operators offer combination packages that bundle the submarine tour with other activities.
Tours typically depart at set times throughout the day, often starting in the morning and running every hour or two until late afternoon. You should arrive 15 to 30 minutes before your scheduled departure to check in, receive a safety briefing, and board. Cancellations due to rough seas or poor visibility do happen — the operator will reschedule you for another day or offer a refund if conditions are unsafe.
What happens during the safety briefing
Before boarding, all passengers watch a safety video or listen to a crew member explain emergency procedures. You will learn where the emergency exits are, how to use the communication system if you need to alert the crew, and what to do if there is a problem. The briefing covers basic rules: stay seated during the dive, keep your hands inside the cabin, and do not touch the windows or equipment.
The crew will also explain how to equalize pressure in your ears if you feel discomfort as the submarine descends. This is the same technique scuba divers use — pinching your nose and gently blowing air into your ears. Most people do this automatically without thinking about it, but the crew reminds you in case you need to do it consciously.
Safety briefings are mandatory and usually take 10 to 15 minutes. They are presented in a calm, matter-of-fact way — submarine tourism has an excellent safety record, and the briefing is standard procedure rather than a sign of danger. After the briefing, you board the submarine and take your seat at a window or in the cabin.
Comparing Atlantis Submarines to other underwater viewing options
Atlantis Submarines lets you see deeper reefs and larger marine life than glass-bottom boats, but without the physical demands of scuba diving or snorkeling. You stay dry and comfortable, and you do not need to hold your breath or manage equipment. The trade-off is that you are looking through windows rather than being in the water, and the experience is more passive — you observe rather than explore.
| Option | How deep you go | How long it lasts | Typical cost | Physical demands |
|---|---|---|---|---|
| Atlantis Submarine | 100–150 feet | 45 min–2 hours | $90–$150 | Minimal; no swimming or diving needed |
| Glass-bottom boat | 0 feet (surface) | 1–3 hours | $30–$80 | None; you stay on deck |
| Scuba diving | 40–130 feet | 30–60 min underwater | $100–$300 | High; requires certification and swimming ability |
| Snorkeling | 0–30 feet | 1–3 hours | $20–$60 | Moderate; requires swimming and comfort in water |
The submarine sits between glass-bottom boats and diving in terms of depth and immersion. Glass-bottom boats are cheaper and require no physical effort, but you see only shallow water and surface-level views. Scuba diving and snorkeling put you in the water but demand swimming ability and physical fitness. The submarine offers a middle ground: you see deeper marine life than a glass-bottom boat without needing to be a swimmer or certified diver.
Frequently Asked Questions
Will I feel claustrophobic in the submarine?
The cabin is compact, but windows line the sides and you can see outside, which helps most people feel less confined. If you have severe claustrophobia, you may want to visit the submarine on the dock before booking to see if the space feels manageable. The crew can also seat you near a window to maximize your sense of openness.
What if I get motion sickness?
Once the submarine is submerged and hovering at depth, motion is minimal — you are not bouncing on waves. Some people feel queasy during the descent or ascent, but this usually passes quickly. If you are prone to motion sickness, take medication before the tour and eat a light meal beforehand. Avoid alcohol the night before.
Can I take photos or videos inside the submarine?
Most operators allow personal cameras and phones, but photos through the windows often come out dark or blurry because of the lighting and glass reflections. Some tours offer professional photos taken by the crew, which you can purchase afterward. Check the operator's policy when you book.
What happens if the submarine has a mechanical problem underwater?
Submarines are regularly inspected and maintained, and mechanical failures are extremely rare. If a problem does occur, the submarine surfaces when ready — it is designed to float on the surface even if engines fail. The crew is trained to handle emergencies, and a support vessel is always nearby. In decades of operation, Atlantis Submarines has maintained an excellent safety record.
Is the submarine tour worth the cost compared to snorkeling?
It depends on what you want. Snorkeling is cheaper and lets you be in the water, but you see only shallow reefs and must be a comfortable swimmer. The submarine shows you deeper ecosystems and larger fish, and you stay dry and comfortable. If you cannot swim, have mobility issues, or want to see deeper marine life without diving certification, the submarine is worth the extra cost.