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.

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."

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

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.