Vomiting Politely on the Dive Boat:
Seasickness most frequently occurs on the dive boat. If you happen to be on the boat when seasickness strikes . . .
1. Acknowledge That You Are, Indeed, Seasick:
When you get seasick you usually go through a stage of embarrassment during which you pretend that you are just fine.
Bad idea. The moment you start to feel nauseated, take action! Move to an appropriate position on the boat and prepare for the worst. Don’t try to act tough — the only thing worse than vomiting during a dive trip is vomiting on the deck or in the cabin.
2. Stop, Think, and Barf:
If the boat is moving, take a moment to position your head so that you are vomiting not into the wind.
3. Location, Location, Location:
If you acknowledge seasickness early and note the direction of the wind, you will have time to position yourself so as to avoid spewing all over the deck and other divers. Move as far back on the dive boat as possible, and onto the lower deck if there are multiple outdoor levels on the boat. Beware the dreaded cross breeze and try to position yourself so that your spewage moves away from the boat.
Seasickness On The Surface
Here’s what to do if you feel seasick in the water before or after a dive.
1. Inflate Your Buoyancy Compensator (BC):
The first and most important action a diver should take whenever he experiences a problem on the surface of the water is to make himself float. Inflate your buoyancy compensator (BC) so that your face is well above the water. This reduces the chance of inhaling or swallowing water during the retching process, which only makes a bad situation much, much worse.
2. Do NOT Switch to Your Snorkel:
Most divers have been trained to switch from their regulators to their snorkels whenever they are on the surface. If you are feeling nauseated and the use of a snorkel or a regulator is necessary to prevent water from splashing into your mouth, be sure to use the regulator, not the snorkel. It’s difficult to vomit with sufficient force to get the vomit completely clear of the snorkel tube. Regulators, on the other hand, are equipped with exhaust valves which make shooting puke out a regulator a piece of cake. Continuing to breathe from the regulator on the surface when seasick has an additional benefit. A diver breathing from his regulator inhales clean, dry air from his tank, avoiding any boat exhaust or other odors which may worsen his condition.
3. Warn Other Divers:
Alert your dive buddy, guide, and other divers from your group so that they may move out of your splash zone. Although it seem embarrassing, it’s a lot less humiliating than sharing your lunch with your fellow divers.
4. Vomit Down Current:
In most cases, there will be a gentle current or drift on the surface. Be sure to vomit down current to avoid having bits of nasty washed back at you and your dive buddies.
5. Communicate:
If you are okay and feel that the nausea will pass let your dive buddies know. If you need to exit the water, be sure to say something. It’s hard to judge whether a sick diver is simply going through a horrible few moments, or is having a bout of seasickness that is more lasting.
You can vomit underwater safely if you get seasick during a dive.
Is It Common to Have to Vomit Underwater While Scuba Diving?
No. In fact, if a diver is feeling seasick on a dive boat, the best thing he can do is to get in the water. Once a diver is off the boat, his seasickness usually disappears because he is moving with the water instead of bouncing around on top if it.
Underwater, a diver is most likely to experience seasickness near or on the surface, where the rocking motion of the waves or surge can be felt on rough days. Other causes of nausea can be vertigo , or an upset stomach caused by exotic food
What Should I Do If I Must Vomit Underwater?:
1. Do Not Remove Your Regulator.
After vomiting, a person will reflexively gasp for air. If a diver removes his regulator to vomit, he may not be able to replace it in time and may inadvertently inhale water. Hold your regulator in your mouth and vomit into the regulator mouthpiece. This will not contaminate the air supply – the vomit will exit through the one-way exhalation valve. The first breath after vomiting should be taken as carefully as possible, ensuring that any leftovers do not get inhaled.
2. Purge the Regulator If Needed.
After vomiting, a diver can use the regulator’s purge button to flood the regulator second stage with air and force any leftover debris out the exhaust valves. A diver purging the regulator after vomiting should take care to place his tongue over the regulator mouthpiece while pressing the purge button, so that any remaining vomit does not get blown back into his mouth.
3. Be Prepared to Switch to the Alternate Air Source.
If a diver is unlucky enough , pieces of puke could become lodged in the regulator mouthpiece and cause it to free-flow or malfunction. This is why you have alternate air source regulators! If a diver does switch to his alternate air source, he should end the dive because diving without an alternate air source regulator available for his buddy is unsafe.
4. End the Dive If Nausea Continues.
Sometimes vomiting makes you feel better. If vomiting once seems to alleviate the nausea, a diver may feel confident in continuing his dive. However, if the nausea keeps on, it is time to surface and end the dive.
5. Wash/ Service the Regulator Second Stage.
A regulator that has been vomited into should be thoroughly washed and may require servicing if any debris remain. A diver who has vomited in his regulator must swallow his pride and alert the appropriate person to make sure that the regulator is cleaned and working properly.
Vomiting underwater is never fun, but it can be done safely when unavoidable.