Thursday, September 3, 2026

Diving Insurance should be mandatory same as fins maks and snorkel after getting certified

 

Diving Insurance: Why Is It Not the First Thing We Talk About With New Divers?




You buy the mask. You buy the fins. You buy the snorkel. You buy the dive computer.

But what happens if, after buying all that equipment, you suddenly need a hyperbaric chamber?

Who pays?

This is a question that every new diver should be asked before their first certification dive.

Unfortunately, the diving industry has become very good at selling equipment to new divers, but we are not always equally good at explaining one of the most important pieces of equipment a diver can have:

Dive accident insurance.

And unlike a new mask or a pair of fins, insurance is not something you can borrow from your dive buddy when something goes wrong.


1. Why are we teaching new divers to buy equipment before insurance?



Think about the typical conversation with a new Open Water student.

They are told:

  • You need a mask.

  • You need fins.

  • You need a snorkel.

  • You should buy a wetsuit.

  • You might want a dive computer.

  • Eventually, you may want your own regulator and BCD.

All of these things have their place.

But there is another question that should be asked much earlier:

"Do you have dive accident insurance?"

A mask might cost $50–$150.

Fins might cost $50–$200.

A snorkel might cost $20–$50.

A dive computer can cost hundreds or even thousands of dollars.

But a serious diving accident can create medical bills that are many thousands of dollars — or potentially much more.

DAN specifically warns that ordinary medical insurance may exclude scuba diving because it is considered a hazardous recreational activity, particularly when diving abroad. Even when regular insurance does provide some coverage, chamber treatment may only be partially covered.

So why do we spend so much time discussing equipment and so little time discussing insurance?

Part of the problem is psychological.

Equipment is something you can see.

You can hold your new mask.

You can try your new fins.

You can show your friends your new dive computer.

Insurance is invisible.

You hope you will never need it.

And precisely because you hope you will never need it, it is easy to postpone buying it.


2. "But I'm only a beginner. I don't need insurance."



This is one of the most dangerous ideas in recreational diving.

A beginner is not immune to a diving accident.

In fact, a new diver is still learning:

  • buoyancy control

  • breathing discipline

  • ascent procedures

  • equalization

  • gas management

  • emergency procedures

  • recognizing abnormal symptoms

  • responding correctly under stress

Even a perfectly planned dive can result in an unexpected medical problem.

And diving accidents are not necessarily caused by someone doing something obviously reckless.

Decompression illness, for example, can occur despite following established dive procedures.

The question isn't:

"Will I have an accident?"

The question is:

"What happens financially if I do?"


3. What does a hyperbaric chamber actually cost?

This is where the subject becomes much more serious.

According to Divers Alert Network, hyperbaric chamber treatment can cost approximately US$330–US$1,000 per hour, before additional medication and physician fees. The actual cost depends on the location, facility and number of treatments required.

DAN has also previously noted that US$800 per hour is not unusual, and some diving injuries require multiple hours of treatment over several days.

So let's imagine a diver requires a 5-hour chamber treatment.

At US$800 per hour:

5 × US$800 = US$4,000

And that is only a simple illustration.

The final bill can also include:

  • Doctor's fees

  • Hospital fees

  • Medication

  • Ambulance transportation

  • Additional chamber treatments

  • Diagnostic tests

  • Hospitalization

  • Emergency evacuation

  • Accommodation or travel expenses

  • Follow-up medical treatment

And if the diver needs several chamber sessions, the bill can quickly become much larger.

DAN's dive accident insurance specifically covers eligible expenses such as hyperbaric chamber treatment, physician and hospital charges, and emergency transportation, subject to the policy terms and limits.


4. The chamber may not be the most expensive part

This is something divers sometimes forget.

Imagine that you are diving on holiday in another country.

You have a serious suspected decompression illness.

You may need to be transported from the dive location to appropriate medical care.

Depending on where you are diving, that could involve:

boat → ambulance → hospital → hyperbaric chamber

In more remote situations, evacuation may be necessary.

DAN reports that the average air ambulance can cost around US$20,000, while more complicated evacuations can cost considerably more.

Suddenly, the question isn't:

"Should I spend $50 on dive insurance?"

It becomes:

"Can I afford a $5,000, $10,000, $20,000 or potentially much larger emergency bill?"


5. Why shouldn't dive insurance be mandatory?

Strictly speaking, dive accident insurance is not legally mandatory everywhere.

But perhaps it should be.

The diving industry already accepts many safety requirements.

We require divers to:

  • complete appropriate training

  • use functioning equipment

  • follow depth and time limits

  • perform buddy checks

  • respect local diving procedures

  • follow boat and dive-center safety rules

So why should financial preparation for a diving emergency be treated differently?

If we accept that diving carries a specific medical risk, then it makes sense to ensure that every diver has access to appropriate financial protection if that risk becomes reality.

This would not mean forcing every diver to buy a particular insurance company or policy.

It would mean establishing a basic principle:

If you want to participate in scuba diving, you should have valid coverage for diving-related medical emergencies.

At Ocean Dreams Pemuteran we include a dive insurance for all our customers . we use dive assist. and it is a 11us$ per day insurance cover up to 50'000us$ for treatment, ambulance, evacuation, chamber hospital etc...




Scan this qr code and get isured today or check the benefit you get with this



6. Dive operators should make insurance part of the safety briefing

Imagine if every dive center said this to every new student:

"Before we talk about buying equipment, let's talk about what happens if you have a diving accident."

That conversation could save someone from a devastating financial situation.

Insurance should be discussed during:

Open Water registration.

Medical screening.

Dive briefing.

Equipment purchase discussions.

And especially before traveling to remote dive destinations.

It should be treated in the same way as other safety equipment.

Not because we expect something to go wrong.

But because we prepare for the things we hope never happen.


7. Your mask won't pay your chamber bill

This may sound obvious, but it is worth saying.

A diver can spend:

$150 on a mask.

$150 on fins.

$100 on a snorkel.

$500 on a computer.

$1,000+ on a regulator.

And still have zero protection against the medical costs of a diving accident.

The equipment is important.

But insurance protects something much more valuable:

your ability to receive the medical treatment you need without having to worry about whether you can afford it.


8. Insurance should be part of responsible diving

Being a responsible diver isn't only about your depth, your air consumption or your buoyancy.

It is also about being prepared for the consequences of an emergency.

Before your next dive, ask yourself three questions:

1. Am I medically fit to dive?

2. Do I know what to do in a diving emergency?

3. Do I have valid insurance that specifically covers diving accidents?

If the answer to number three is "I'm not sure," check before you enter the water.

Do not assume your normal travel insurance covers scuba diving.

Do not assume your health insurance covers a hyperbaric chamber.

Do not assume that because you are a certified diver, everything is automatically covered.

DAN specifically recommends checking whether your existing insurance excludes diving or provides insufficient coverage for chamber treatment.


9. The real cost of diving insurance

This is perhaps the biggest misunderstanding.

Divers sometimes hesitate to pay for insurance because they think:

"I'm only diving for a few days."

But compare the price of insurance with the potential cost of treatment.

Some DAN dive accident insurance plans start at around US$42 per year, although pricing and availability depend on the diver's country and specific plan.

The exact insurance product is less important than the principle:

Understand what you are buying and make sure it actually covers diving.


10. The diving industry needs to change the conversation

Maybe we have been approaching this backwards.

When someone says:

"I'm starting scuba diving. What equipment should I buy?"

Perhaps the first answer shouldn't be:

"You need a mask and fins."

Perhaps it should be:

"First, let's make sure you are medically fit to dive and properly insured."

Then we can talk about masks, fins and computers.

Because a good mask makes diving more comfortable.

Good fins make diving more efficient.

A good dive computer helps you manage your dive.

But insurance can make sure that if something goes seriously wrong, you can get the treatment you need.

Your mask can wait.

Your fins can wait.

The new dive computer can wait.

Your safety shouldn't.


A final question for the diving industry

If we already agree that diving insurance is important enough to recommend to experienced divers...

Why aren't we making it one of the first things we explain to every new diver?

Perhaps the next generation of divers should learn one more rule alongside "Never hold your breath":

Never enter the water without knowing how your diving accident will be paid for.

This article is intended for diving safety education and is not financial or medical advice. Insurance policies differ by country, insurer, exclusions, limits and conditions. Divers should read their policy carefully and confirm that scuba diving and hyperbaric treatment are covered before diving.

Thursday, August 13, 2026

how to behave during a scuba dive with current to stay safe

 When diving in current, the main goal is to avoid fighting the water, stay with your buddy/group, and keep enough gas for the conditions...and fly



🌊 Diving safely in current



  • Check the current before entering. Watch the water, ask the guide about direction and strength, and understand the dive plan and pickup procedure.

  • Experience the current step by step. begin with a light current and increase the speed when you are comfortable.current can be scary as it overhelm yourself and it is stronger than you

  • Whenever practical, start against the current. This can make the return easier because the current helps you back. For a drift dive, follow the planned direction instead.

  • Stay close to your buddy and guide. Current can separate divers surprisingly quickly. Don't let the group become spread out.

  • Stay close to the reef or bottom when appropriate. Current is often weaker near the structure. But never grab or damage coral.

  • Streamline yourself. Secure your SPG, alternate air source, camera and other equipment. A horizontal position reduces drag.

  • Don't fight a strong current. If you're getting tired, signal your buddy/guide. Move closer to shelter, change direction if appropriate, or end the dive.

  • Watch your breathing and gas more frequently. Swimming against current increases exertion and gas consumption considerably. Turn/end the dive earlier than you would in calm water.

  • If caught in a strong current, don't panic. Depending on the site and dive plan, swimming diagonally or perpendicular to the current may help you reach weaker water rather than exhausting yourself trying to swim directly against it.

  • For a drift dive, drift with the current. Maintain good buoyancy, stay together and let the boat follow the divers rather than trying to return to the entry point.

  • Carry an SMB/DSMB and signaling devices. A surface marker, whistle and—where appropriate—light are particularly important on current dives.

  • If separated underwater, follow the agreed lost-buddy procedure. Commonly this means a brief underwater search followed by a controlled ascent, rather than chasing the other diver through the current.

  • On the surface, stay positively buoyant. Inflate your BCD, keep your mask and regulator/snorkel available, signal the boat with your SMB and don't exhaust yourself swimming after it.

⚠️ Most important rule

If the current is stronger than your experience, fitness or training can comfortably handle, don't make the dive—or abort it early. There is nothing wrong with changing the dive site or waiting for better conditions.

For students/new divers, I would emphasize one simple rule: never exhaust yourself trying to beat a current. Stop, communicate, find shelter or end the dive.

Monday, August 10, 2026

When to avoid scuba diving

 You should avoid scuba diving whenever a condition could make you lose consciousness, impair breathing or judgment, prevent safe equalization, or increase the risk of serious injury under pressure.




Common reasons to not dive include:

  • Cold, flu, sinus congestion, blocked nose or ear problems — you may not be able to equalize safely.

  • Fever, significant infection, vomiting or diarrhea — dehydration and reduced fitness increase risk.

  • Shortness of breath, chest pain, uncontrolled asthma, or a significant respiratory infection.

  • Uncontrolled high blood pressure or significant heart/circulation problems until medically cleared.

  • Recent surgery, hospitalization, or serious illness until a doctor familiar with diving clears you.

  • Pregnancy — recreational scuba diving is generally not recommended.

  • Alcohol or recreational drugs — don't dive while impaired or hungover.

  • Medication that causes sleepiness, dizziness, impaired judgment, or other significant side effects until its compatibility with diving has been assessed.

  • Extreme fatigue, dehydration, or feeling generally unwell.

  • Ear pain, difficulty equalizing, vertigo or hearing problems.

  • After a suspected decompression illness or lung over-expansion injury — stop diving and obtain medical assessment.

  • After flying: flying before diving generally isn't the concern; flying after diving requires an appropriate surface interval.

A useful rule for instructors and divers is: being physically capable of getting into the water isn't the same as being medically fit to dive. When there's uncertainty about a cardiovascular, neurological, pulmonary, or medication-related issue, a diving-medicine physician should make the call.

Tuesday, August 4, 2026

What truly makes an experienced diver?

 What truly makes an experienced diver?



It's not the number of dives in your logbook—it's the decisions you make underwater.

An experienced diver:
• Has excellent buoyancy and good air consumption.
• Stays calm and solves problems without panic.
• Plans every dive carefully and checks their equipment.
• Knows their limits and isn't afraid to call off a dive when conditions aren't right.
• Respects and protects the marine environment.
• Looks after their buddy as much as themselves.
• Never stops learning, no matter how many dives they've logged.

In the end, the most experienced divers aren't the ones who take the biggest risks—they're the ones who know they don't have to.

Saturday, June 27, 2026

CAN YOU DO BLOOD DONATION AFTER DIVING

 



Yes, you can donate blood after diving, but it is recommended to wait before doing so.

Blood donation removes fluid from your body and can cause mild dehydration. Dehydration is a known factor that may increase the risk of decompression sickness (DCS). For that reason, many diving medicine experts recommend:

  • Wait at least 12 hours after a single no-decompression recreational dive before donating blood.
  • Wait 24 hours after multiple dives, deep dives, or dives over several days.
  • Make sure you are well hydrated before and after donating.

If you plan to dive after donating blood, it is generally recommended to wait at least 24 hours before diving. Blood donation temporarily reduces blood volume and can make you feel fatigued, lightheaded, or less able to cope with diving stresses.

For divers, the safest order is usually:

  1. Dive.
  2. Wait 12–24 hours.
  3. Donate blood.

If you are teaching or guiding dives, or if the dives were particularly deep or repetitive, I'd lean toward the 24-hour wait.

How many dives did you do, and what were the depths? I can give a more specific recommendation.

Thursday, June 25, 2026

What to do if an earthquake happen during scuba diving





If you are already underwater when the earthquake starts, a more detailed procedure would be:

  1. Stop and assess

    • Do not immediately ascend.

    • Signal your buddy and stay together.

    • Check that you are neutrally buoyant.

  2. Look for hazards

    • If you are close to a reef wall, steep slope, cave, wreck, or overhang, move slowly into open water.

    • Watch for falling rocks, coral fragments, or clouds of sediment.

  3. Protect yourself from debris

    • If debris is falling, hold your regulator securely in your mouth.

    • Protect your mask with one hand if necessary.

    • Maintain buoyancy to avoid being pushed into the bottom.

  4. Monitor conditions

    • Check your depth, no-decompression status, and air supply.

    • Visibility may drop suddenly due to disturbed sand and silt.

    • Strong local currents may develop near underwater terrain.

  5. Stay below the surface initially

    • Do not rush to the surface unless there is an immediate life-threatening hazard.

    • A rapid ascent creates a greater risk of lung overexpansion injury or decompression sickness than the earthquake itself.

  6. End the dive conservatively

    • Once the shaking stops and conditions permit, begin a controlled ascent with your buddy.

    • Follow your normal ascent rate.

    • Complete a safety stop if conditions allow and your air supply is adequate.

  7. After surfacing

    • Inflate your BCD and establish positive buoyancy.

    • Look for your boat and listen for instructions.

    • If the earthquake was strong or lasted a long time, assume there could be a tsunami risk.

    • Follow the boat crew's emergency procedures immediately.

Special situations

Cave diving

  • Stay calm and maintain contact with the guideline.

  • Expect silt-outs from disturbed sediment.

  • Exit using standard lost-visibility procedures if necessary.

Wreck diving

  • Watch for falling rust, plates, cables, and interior collapses.

  • Consider terminating the dive immediately and exiting the wreck.

Deep diving

  • Be especially careful not to violate decompression obligations.

  • An uncontrolled ascent can be more dangerous than remaining underwater during the quake.

For dive leaders and instructors

A practical SSI-style briefing point is:

"If we feel shaking or hear unusual rumbling underwater, stay with your buddy, move away from overhead environments and unstable structures, maintain buoyancy, and end the dive with a normal controlled ascent. Do not make a rapid ascent solely because of the earthquake."


Wednesday, June 24, 2026

HOW IS SCHEDULED SSI INSTRUCTOR EXAMINATION 2026 IN BALI



EXAM  INSTRUCTOR EXAMINATION OR IE

OVER 2 DAYS

è The assignment include:

è 1. Class presentation / can be on owc / nitrox/sod/ dive guide/ rescue

è 2. pool presentation 1 skill with demo with briefing  finding mistakes debriefing 2 students

è 3. sea presentation 2 skills no demo  with briefing  finding mistakes debriefing 2 students

è 4. rescue exercice / unresponsive diver uw à bring up à surface procedure à tow back à exit water

è 5.  3 skills  from skill circuit

è  

DAY 1

11h00 Am onward

Welcome & Introduction

                                 Hand out Evaluation Topic Sheet. assigment

                                 50 Questions Theory & Standard Exam (1.5 hours)

                                 Lunch Break (1 hour) + prep for pool/confined water session

 

                                 1 (One) Skill Pool / Confined Water Presentation

                                 3 (Three) Skills Circuit Evaluation in Pool / Confined Water

                                 1 (One) Rescue Skill Evaluation

 

Go back home and prepare classroom + sea presentation for next day

 

DAY 2    à SEA 

8:30 AM- onward

               2 (two) Skills Open Water Presentation

                     1 Academic Teaching Presentation (12-15Min)

                     Lunch Break (1h)

                     Education System Evaluation (20-30Min)  

               Professional Evaluation (optional)

               Performance Review

               Graduation & Closing


THEN YOU ARE CERTIFIED AS AN SSI OPEN WATER INSTRUCTOR





Friday, June 19, 2026

Scuba Diving and Pregnancy

 





The current medical and diving recommendation is clear: pregnant women should not scuba dive at any stage of pregnancy. (Divers Alert Network)

Why is scuba diving not recommended?

  • During a dive, nitrogen dissolves into the body tissues.
  • During ascent, tiny gas bubbles can form.
  • An adult's lungs can usually filter these bubbles, but a fetus does not have functioning lungs to filter gas bubbles because oxygen comes through the placenta.
  • There is a theoretical risk of:
    • Fetal decompression sickness
    • Gas embolism
    • Birth defects
    • Miscarriage or fetal injury

What if a woman dived before knowing she was pregnant?

This happens quite often. Available human studies have not shown a consistent pattern of severe problems, and accidental diving early in pregnancy is generally not considered a reason to terminate a pregnancy. However, the woman should stop diving once pregnancy is suspected or confirmed and discuss the exposure with her doctor.

Can pregnant women snorkel?

Surface snorkeling, swimming, and other low-risk water activities are generally considered safer alternatives, provided the pregnancy is uncomplicated and the woman's doctor approves.

Diving organization guidance

Organizations such as the Divers Alert Network (DAN) advise women to avoid scuba diving during pregnancy and when pregnancy is suspected.

Sunday, May 17, 2026

What is oxygen toxicity in scuba diving and how to avoid it...




Oxygen toxicity in scuba diving happens when a diver breathes oxygen at a high partial pressure (PPO₂) for too long.

Although oxygen is essential for life, under pressure underwater it can become toxic to the body, especially the brain (CNS toxicity) and lungs (pulmonary toxicity).

Why it happens

As depth increases, gas pressure increases.
Even normal air (21% oxygen) becomes “stronger” under pressure.

Example:

  • At the surface: PPO₂ of air = 0.21 ATA

  • At 30 m / 100 ft: PPO₂ of air ≈ 0.84 ATA

  • With enriched air nitrox (EAN32 or EAN36), PPO₂ rises faster.

Most recreational agencies limit:

  • Working PPO₂: 1.4 ATA

  • Maximum contingency PPO₂: 1.6 ATA


Types of Oxygen Toxicity

1. CNS Oxygen Toxicity (Central Nervous System)

This is the dangerous one for divers because it can cause sudden convulsions underwater.

Symptoms

Remember the acronym VENTID-C:

  • Vision changes (tunnel vision)

  • Ears ringing

  • Nausea

  • Twitching (especially lips)

  • Irritability

  • Dizziness

  • Convulsions

A seizure underwater can lead to drowning if the regulator is lost.

Main causes

  • Exceeding maximum depth for the gas

  • High PPO₂

  • Long exposure

  • Stress, fatigue, cold, CO₂ buildup


2. Pulmonary Oxygen Toxicity

Usually affects technical divers or hyperbaric treatments after very long oxygen exposure.

Symptoms

  • Chest burning

  • Coughing

  • Difficulty breathing

Rare in recreational diving.


Nitrox and Oxygen Toxicity

With EAN32 (32% oxygen):

  • MOD at PPO₂ 1.4 = about 33 m / 110 ft

  • MOD at PPO₂ 1.6 = about 40 m / 132 ft

With EAN36:

  • MOD at PPO₂ 1.4 = about 28 m / 95 ft

This is why nitrox divers must always analyze tanks and respect MODs.


How to Avoid Oxygen Toxicity

1. Stay within MOD (Maximum Operating Depth)

Never exceed the depth limit for your gas mix.

Formula:
[
MOD = \left(\frac{PPO₂}{FO₂} -1\right)\times10
]
(metric)


2. Monitor PPO₂

Modern dive computers display PPO₂ during nitrox dives.

Keep:

  • Preferred ≤ 1.4 ATA

  • Emergency max ≤ 1.6 ATA


3. Avoid CO₂ buildup

High carbon dioxide increases risk dramatically.

Avoid:

  • Skip breathing

  • Overexertion

  • Poor buoyancy causing hard swimming


4. Limit exposure time

Even acceptable PPO₂ becomes risky over long periods.

Technical divers track:

  • CNS %

  • OTUs (oxygen tolerance units)


5. Analyze your gas

Always personally verify:

  • Oxygen percentage

  • MOD

  • Computer settings


6. Stay calm and rested

Fatigue, stress, dehydration, and cold may increase susceptibility.


What to Do if Symptoms Appear

If twitching, dizziness, or visual disturbances occur:

  1. Ascend slightly to reduce PPO₂

  2. Stop exertion

  3. Signal your buddy

  4. End the dive safely

If a diver convulses underwater:

  • Keep regulator in mouth if possible

  • Do not ascend immediately during active seizure

  • Wait until convulsions stop

  • Then perform controlled ascent


Recreational Diving Reality

For normal recreational diving:

  • Air diving rarely reaches dangerous PPO₂ levels

  • Oxygen toxicity risk mainly appears with:

    • Nitrox

    • Deep diving

    • Technical diving

    • Rebreathers

That’s why proper nitrox training is important before using enriched air.

Friday, May 15, 2026

Why 30 meters is a common recommended depth

 




At 30 m, the pressure is about:

P \approx 4\ \text{ATA at 30 m}

That means:

  • You breathe air compressed to 4 times surface pressure.
  • Your tank empties much faster.
  • Nitrogen absorption increases significantly.

This depth is deep enough to:

  • See wrecks and walls
  • Experience “deep diving”
  • Still stay within recreational limits for trained divers

Many agencies like PADI and SSI use 30 m as a key training depth before the absolute recreational maximum of 40 m.


Benefits of diving around 30 m

🐠 Access to deeper sites

Many famous:

  • wrecks
  • drop-offs
  • caves entrances
  • pelagic fish zones

are around 25–30 m.


🌈 Often clearer water

Deeper water can have:

  • less wave movement
  • less sediment
  • better visibility

especially in tropical places like Bali.


🤿 Advanced diving experience

At 30 m you learn:

  • buoyancy precision
  • gas management
  • narcosis awareness
  • discipline and planning

It’s where diving becomes more technical mentally.


🐟 Different marine life

Some species prefer deeper zones:

  • reef sharks
  • large trevallies
  • barracudas
  • deep reef fish

Negative aspects / risks

😵 Nitrogen narcosis

At 30 m many divers begin feeling:

  • slower thinking
  • overconfidence
  • poor judgment
  • tunnel vision

Like being mildly drunk underwater.


⏱️ Much shorter bottom time

No-decompression limits become short.

Approximate NDL on air:

  • 18 m → ~56 min
  • 30 m → ~20 min

So dives are shorter.


🫁 Faster air consumption

Because pressure is 4 ATA:

\text{Air consumption at 30 m} \approx 4 \times \text{surface rate}

A diver who breathes:

  • 15 L/min at surface
    may use:
  • ~60 L/min at 30 m.

This surprises many new deep divers.


🚑 Increased decompression sickness risk

More nitrogen enters tissues faster.
Ascents must be:

  • controlled
  • slow
  • with safety stops

🌑 Less light and color

Red disappears first underwater.
At 30 m:

  • colors look blue/green
  • less natural brightness

😰 Harder emergency management

Problems become more serious:

  • out of air
  • panic
  • entanglement
  • rapid ascent

Everything is less forgiving deep down.


⚖️ Why not recommend deeper for everyone?

Beyond 30–40 m:

  • narcosis increases strongly
  • air becomes inefficient
  • decompression obligations become significant
  • oxygen toxicity starts becoming a concern on some gas mixes

That’s why deeper diving usually transitions toward:

  • technical diving
  • special gas mixes
  • decompression procedures
  • redundant equipment

🧭 In practice

For many experienced recreational divers:

  • 18–24 m = comfortable fun zone
  • 30 m = “deep dive” (in diving more than 18 meters is consider deep dive )
  • 40 m+ = serious diving requiring much more training

30 m is basically the point where diving is still recreational, but the risks start increasing quickly.


🌊 Adding Nitrox 32% (EAN32) to the discussion

EAN32 Nitrox — often called Nitrox 32% — changes some of the advantages and limitations of a 30 m dive.

Normal air contains about:

  • 21% oxygen

  • 79% nitrogen

EAN32 contains:

  • 32% oxygen

  • 68% nitrogen

So you breathe less nitrogen, which is the key benefit.


✅ Benefits of Nitrox 32% at 30 m

⏱️ Longer no-decompression limits

Because you absorb less nitrogen, your NDL increases.

Approximate comparison at 30 m:

  • Air → ~20 min

  • EAN32 → ~30 min

That is a major advantage for:

  • photographers

  • instructors

  • repetitive diving

  • liveaboards


😌 Reduced nitrogen loading

Many divers report:

  • feeling less tired after dives

  • less “foggy”

  • better recovery during repetitive diving days

Scientifically, the reduced nitrogen exposure is real.


🔁 Better repetitive diving

Nitrox is especially useful in places like Bali where divers may do:

  • 3–4 dives/day

  • several days in a row

Less nitrogen accumulation means:

  • shorter surface intervals

  • more conservative profiles


❌ Limitations and risks of Nitrox 32%

☠️ Oxygen toxicity becomes important

Higher oxygen means deeper depth limits.

For EAN32, the commonly accepted maximum operating depth (MOD) at 1.4 PPO₂ is:

\text{MOD}_{EAN32} \approx 33\ \text{m at } PPO_2 = 1.4

That means:

  • 30 m is close to the safe recreational limit

  • going deeper accidentally becomes more dangerous


🚫 Not a “deep diving gas”

Many beginners mistakenly think:

“Nitrox lets me dive deeper.”

Actually:

  • Nitrox is mainly for longer and safer shallow-to-mid-depth dives

  • Deep technical diving often uses Trimix, not Nitrox


🔥 CNS oxygen exposure

Long or repetitive Nitrox dives increase:

  • Central Nervous System (CNS) oxygen exposure

Too much oxygen exposure can cause:

  • convulsions underwater

  • loss of consciousness

Though rare in recreational diving, it is taken very seriously.


📋 Requires training and analysis

Divers must:

  • analyze the tank

  • confirm oxygen percentage

  • set their dive computer correctly

  • respect MOD

That’s why agencies like SSI and PADI require a Nitrox certification.


⚖️ In summary

Air at 30 m

✅ Simple
✅ Larger depth margin
❌ Shorter bottom time
❌ More nitrogen loading

Nitrox 32% at 30 m

✅ Longer NDL
✅ Less nitrogen
✅ Better repetitive diving
❌ Closer to oxygen limits
❌ Requires stricter depth control


For many experienced recreational divers, EAN32 is ideal for dives between 18–30 m, especially on dive trips with many repetitive dives.


at ocean dreams Pemuteran we offer advanced open water and nitrox certifications

contact us @ info@oceandreams.asia