Dive Like A Pro: Don’t go ballistic!

Learn to Dive like a Pro
Learn to Dive like a Pro

Last Updated on June 10, 2024 by Divernet Team

MARTIN SAMPSON explains the importance of making a controlled ascent – and why it should be treated as a separate phase of a scuba dive

Recently at a local dive-site, I saw a pair of divers come to the surface in such a way as to make me wonder whether they thought that the dive had ended when they left the bottom. The creation of a large Jacuzzi a few seconds before one of the diver’s heads broke the surface grabbed my attention first. 

That he arrived on the surface with his BC already inflated only confirmed my suspicions that this was not a perfect ascent.

A couple of rapid 360s, combined with a “where am I?” expression on his face, was followed up with a half-hearted “I’ve made it back alive so I must be OK” signal. His buddy arrived on the surface a few seconds afterwards – I don’t think his ascent skills were any better.

Techniques

It’s true that for most of us, the descent and the exploration at the bottom is the exciting part of the dive. But in terms of what’s about to happen in your body, the ascent is where it’s at.

Expanding air will be trying to escape from your BC, drysuit, middle ears, sinuses, lungs, and even your teeth. Nitrogen bubbles might try to form in body tissues – and probably will, in most cases. 

Enjoying bottom-time
Enjoying bottom-time

As well as having an awareness of the problems these can cause in the back of your mind, you will be controlling your posture in the water, maintaining contact with your buddy, monitoring your ascent rate, and venting air from your BC and drysuit.

For some divers, operating a surface marker buoy and performing decompression stops as well could be a task too far.

Perfect buoyancy is a big help on long stops
Perfect buoyancy is a big help on long stops

The one device that can help enormously with an ascent as well as a descent is a shot-line, a temporary anchor-line that you can use as a visual and tactile datum. This gives you an immediate visual reference for both orientation and ascent rate and can help keep a buddy-pair together. 

A shot-line needs to be set up before a dive and good dive-boat skippers are well practised at providing them. The other device worth its weight in gold is a dive-computer with a clear ascent-rate display, and even clearer ascent-rate warning.

Diver operating drysuit valve staying close to line
Operating a drysuit valve while staying close to the line

Before I ascend from any dive, I like to pause for several seconds to think about it and stow equipment that I won’t need during the ascent. If I am planning to use a delayed SMB, I’ll need even longer to get organised. I might want to adjust my buoyancy slightly as well. 

Decompression
Decompression

In other words I like to clear my head, so that every ascent is a considered and relaxed event entirely separate from the rest of the dive.

With deeper dives involving mandatory decompression stops, I believe this approach to be vital, especially because the duration of the ascent and decompression stops could be several times longer than the time spent at the bottom.


Getting ready to ascend
Getting ready to ascend

Top tips

  1. Buoyancy control depends partly on your state of mind. Plan the dive thoroughly and eliminate any concerns you might have before getting in the water.
  1. Give yourself plenty of time to get back to your exit point or the shot-line. Especially on deeper dives, keep navigation simple and stay relaxed.
Relaxed at the safety stop.jpg
Relaxed on the safety stop
  1. Don’t push your air supply to the limit. You might need more air than you think for the ascent, especially if your computer requires you to complete a decompression stop, or you get an unexpected “reverse block” that takes time to clear.
  1. Aim to arrive at the exit-point with time to spare to clear your head and get organised for the ascent.
  1. Check your air, bottom-time, and position your computer so that you will be able to easily monitor your ascent-rate.
  1. If you are using a drysuit with an adjustable valve, you might have closed it during the dive. Open it so that it will dump enough air during the ascent, but not so much that you become negatively buoyant.
  1. Check that your buddy has had enough time to get ready to ascend.  
Ascending a shot line
Ascending a shot line
  1. Check your buoyancy so that you can begin the ascent easily. Don’t dump air too soon, because this will only cause you to fin harder to get the ascent going. 
  1. Aim to maintain an ascent-rate just below the allowable maximum for your computer or table. Especially from deeper dives you can ascend too slowly, because inadequate elimination of nitrogen during the ascent could lengthen decompression stops.
  1. Even if a mandatory stop is not required, aim to complete a safety-stop of at least three minutes at 5m, or at the stop-depth given by your computer. Trim your buoyancy at the stop so that you can be totally relaxed and neutrally buoyant.
Diver checking above before surfacing
Diver checking above before surfacing
  1. As you leave the safety stop, look up and also listen out for boat-engines. If in any doubt, raise your hand above your head just before you get to the surface.

Photographs by Martin Sampson

Also on Divernet: Night Diving, Developing Core SkillsColdwater Diving, Caring For Diving EquipmentCalling A DiveConnecting On The DiveDealing With Surge & SwellsHow To Stay In Shape

This week, it looks like DPV manufacturer ScubaJet has begun insolvency proceedings. PADI has distributed half a million dollars in their Project Aware campaign. Dorset coastguard have called off the search for a missing diver. And the Pearl Fleet has commented on a viral video of a shark-dive that didn’t go so well
https://taucher.net/diveinside-insolvency_proceedings_at_scubajet-kaz9246
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https://divernet.com/scuba-news/health-safety/pearl-fleet-hits-back-as-maldives-shark-dive-slammed/
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The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. All content, including text, graphics, images, and information, contained in this video is for general information purposes only and does not replace training from a qualified Dive Instructor.

This week, it looks like DPV manufacturer ScubaJet has begun insolvency proceedings. PADI has distributed half a million dollars in their Project Aware campaign. Dorset coastguard have called off the search for a missing diver. And the Pearl Fleet has commented on a viral video of a shark-dive that didn’t go so well
https://taucher.net/diveinside-insolvency_proceedings_at_scubajet-kaz9246
https://divernet.com/scuba-news/conservation/padi-aware-distributes-500k-in-mission-hub-grants/
https://www.scubadivermag.com/raid-launches-ots-full-face-mask-programme/
https://www.scubadivermag.com/dorset-coastguard-call-off-search-for-diver/
https://divernet.com/scuba-news/health-safety/search-for-diver-off-dorset-stood-down/
https://divernet.com/scuba-news/health-safety/pearl-fleet-hits-back-as-maldives-shark-dive-slammed/
Diving Into The Darkness Link:
https://www.scubadivermag.com/affiliate/mzsd


Become a fan: https://www.scubadivermag.com/join
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The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. All content, including text, graphics, images, and information, contained in this video is for general information purposes only and does not replace training from a qualified Dive Instructor.

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Sharks and Yum Yum Yellow. What are your thoughts? #askmark
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@preethasebastian8921
Sharks and Yum Yum Yellow. What are your thoughts? #askmark
#scuba #scubadiving #scubadiver
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@emilyZA460
#AskMark hi! I was hoping you could help me understand the interchangeability of a DSMB and a simple SMB if I only plan to use it when I deploy it during my safety stop at 5 meters. I used the simple version for this purpose during my last liveaboard and despite occasionally having to reinflate at the surface due to some air escaping while being deployed underwater, it didn’t seem to be too problematic and so I was wondering if it’s necessary to have a DSMB for this purpose? The issue for me is that somehow I tend to end up misplacing my SMB quite often and so the price difference between the two makes it a more acceptable loss when it’s replacing the SMB regularly rather than the DSMB at double the cost
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We partner with https://www.scuba.com and https://www.mikesdivestore.com for all your gear essentials. Consider using the affiliate link above to support the channel.

The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. All content, including text, graphics, images, and information, contained in this video is for general information purposes only and does not replace training from a qualified Dive Instructor.

Diving Into The Darkness Website:
https://www.scubadivermag.com/affiliate/mzsd

@emilyZA460
#AskMark hi! I was hoping you could help me understand the interchangeability of a DSMB and a simple SMB if I only plan to use it when I deploy it during my safety stop at 5 meters. I used the simple version for this purpose during my last liveaboard and despite occasionally having to reinflate at the surface due to some air escaping while being deployed underwater, it didn’t seem to be too problematic and so I was wondering if it’s necessary to have a DSMB for this purpose? The issue for me is that somehow I tend to end up misplacing my SMB quite often and so the price difference between the two makes it a more acceptable loss when it’s replacing the SMB regularly rather than the DSMB at double the cost
#scuba #scubadiving #scubadiver
LINKS

Become a fan: https://www.scubadivermag.com/join
Gear Purchases: https://www.scubadivermag.com/affiliate/dive-gear
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Website: https://www.scubadivermag.com ➡️ Scuba Diving, Underwater Photography, Hints & Advice, Scuba Gear Reviews
Website: https://www.divernet.com ➡️ Scuba News, Underwater Photography, Hints & Advice, Travel Reports
Website: https://www.godivingshow.com ➡️ The Only Dive Show in the United Kingdom
Website: https://www.rorkmedia.com ➡️ For advertising within our brands
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We partner with https://www.scuba.com and https://www.mikesdivestore.com for all your gear essentials. Consider using the affiliate link above to support the channel.

The information in this video is not intended nor implied to be a substitute for professional SCUBA Training. All content, including text, graphics, images, and information, contained in this video is for general information purposes only and does not replace training from a qualified Dive Instructor.

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Seneca Vidrine
Seneca Vidrine
1 year ago

Awesome photos and beach!!

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