Your Dive Computer: Tips and tricks - PART 1

Push the right buttons

You should know not only which buttons to push to make your computer work, but also which mathematical model or model derivation it employs in making its decompression computations. There is a surprising range in models, from conservative to liberal, and these differences may not be evident at first glance. For example, a computer may establish conservative limits for an initial dive but liberal limits for repetitive diving.

It is best to learn enough about the various available models and derivations before you select a dive computer, so you are sure to choose one that is compatible with your own level of risk tolerance. Choosing one purely based on familiarity may not be the best strategy. Even if you have had good outcomes on previous dives with a computer, it does not guarantee that it will be the best one for your future diving. Accumulating knowledge takes commitment, but informed planning for decompression safety should be a top concern.

Tune in and turn on

Failing to turn on your dive computer (or to take it with you on a dive) may sound like a joke, but it does happen and can create real problems. No computer can factor in the exposure profile of a previous dive if it was not there. And any decompression model is invalid unless you start using it when you are “clean” — fully off-gassed from any previous dives. If you forget to take your computer with you on a dive early in a repetitive series, you are then restricted to using tables for the duration of that series (assuming that you are able to manually compute the exposure of the unmonitored dive). And do not even think about hanging your computer on a down-line during a surface interval in an effort to compensate for having forgotten it on an earlier dive; there may be stories about that happening, but it is not a responsible practice.

Use it appropriately

The only person who does not have to worry about taking a dive computer on every dive is the one who uses it solely as a data-logger — that is, only to record time and depth information instead of to calculate decompression profiles. Remember, however, that using your computer simply to log your time and depth data means that you must still plan all your dives using dive tables and must recompute your repetitive group status afterward, as appropriate.

You cannot move in and out of relying on your computer’s decompression computations unless it has recorded all of your exposure profiles. There are some basic guidelines that can help to ensure the safe and effective use of a dive computer. The following considerations are intended to offer a somewhat light-hearted insight into what your dive computer can — and cannot — do.

It is helpful to think of your dive computer in these ways:

•As a business competitor: Master it by learning its strengths and weaknesses.
•As a date: It must be turned on for the relationship to work.
•As a buddy: It should descend and ascend whenever, but only when, you do.
•As a personal assistant: It reminds you of rules and schedules you might otherwise forget.
•As an actor: It recites the lines without having to understand their implications.
•As a politician: Do not believe everything it tells you.
•As a hotel concierge: It will help you do what you want — but at a price.
•As a stranger: It knows virtually nothing about your personal reality.
•As a mate: Is it compatible with your friends?
•As a news reporter: It will air your dirty laundry.
•As a tool: Use it appropriately.

Categories

 2019
 2018
 2016
After anaesthesia Air Quality Air exchange centre Air hose failure Altitude changes Altitude sickness Ama divers Anaerobic Metabolism Annual renewal Apnea Apnoea Arterial gas embolism Arthroscopic surgery Aurel hygiene BCD Badages Bag valve mask Bandaids Barbell back squat Bench press Blood flow Bouyancy compensators Boyle's Law Boyle\'s Law Bradycardia Brain Breast Cancer Breath Hold Diving Breath hold Breath-hold Breathing Gas Breathing Bruising Buoyancy Burnshield CGASA CMAS CO2 Cabin pressure Camera settings Cancer Remission Cancer treatments Cancer Cannabis and diving Cannabis Cape Town Dive Festival Carbon dioxide Cardio health Cardiomyopathy Chamber Safety Charles' Law Charles\' Law Charles\\\' Law Charles\\\\\\\' Law Charles\\\\\\\\\\\\\\\' Law Chemotherapy Cleaning products Coastalexcursion Cold Water Cold care Cold Compressed gas Conservation Contaminants Contaminated air Corals Courtactions Crohns disease Crystal build up Crystallizing hoses Cutaneous decompression DAN Courses DAN Profile DAN Researchers DAN medics DAN report DCI DCS Decompressions sickness DCS DM training DReams Dalton's Law Dalton\'s Law Dalton\\\'s Law Dalton\\\\\\\'s Law Dalton\\\\\\\\\\\\\\\'s Law Deco dives Decompression Illness Decompression Sickness Decompression illsnes Decompression treatment Decompression Diaphragms Diseases Dive Chamber Dive Industry Dive Instruction Dive Instructor Dive Pros Dive Research Dive Training Dive accidents Dive buddies Dive computers Dive gear Dive health Dive medicines Dive medicine Dive safety Dive staff Diveleader training Diveleaders Diver Profile Divers Alert Diving Kids Diving career Diving emergencies Diving guidelines Diving injuries Diving suspended Diving Domestic Donation Dr Rob Schneider Drysuit diving Drysuit valves Drysuits EAPs EAP Ear pressure Ear wax Ears injuries Education Emergency action planning Emergency decompression Emergency plans Emergency underwater Oxygen Recompression Emergency Enviromental Protection Environmental factors Environmental impact Environmental managment Equipment care Evacuation Exercise Extended divetime Extinguisher Extreme treatments Eye injuries FAQ Failures Fatigue Faulty equipment Fire Coral Fire Safety Firefighting First Aid Equipment First Aid Training First Aid kits Fish Fitness Flying Francois Burman Free diving Free flow Freedive Training Freediver Freediving performance Gas Density Gas laws Gas mixes GasPerformance Gases Gastric bypass Gear Servicing Gordon Hiles HELP HIRA Haemorhoid treatment Hazard Description Hazardous Marine life Health practitioner Heart Health Heart Helium High temperatures Hot Humans Hydrate Hydrogen Hydroids Hydrostatic pressure Hyperbaric Chamber Hyperbaric research Hypothermia Immine systems In Water Recompression Indemnity form Indian Ocean Inert gas Infections Instinct Instructors Insurance Integrated Physiology International travel International Irritation Kidneys Kids scubadiver Labour laws Legal advice Legislation Leukemis Liability Risks Liability releases Liability Life expectancy Lifestyle Low blood pressure Low pressure deterioration Low volume masks Lung function Lung injuries Lung MOD Maintenance Mammalian Dive Response Mammalian effect Master scuba diver Maximum operating depth Medical Q Medical questionaire Medical statement Middle ear pressure Mike Bartick Military front press Mixed Gas Mono Fins Mooring lines More pressure Muscle pain Mycobacterium marinum Nautilus Nitrogen build up Nitrox No-decompression Non-rebreather Mask Normal Air Nosebleeds O2 providers O2 servicing OOxygen maintenance Ocean pollution Orbital implants Oronasal mask Oxygen Cylinder Oxygen Units Oxygen deficit Oxygen deicit Oxygen ears Oxygen equipment Oxygen masks Oxygen supply Oxygen therapy Oxygen P J Prinsloo PFI PJP Tech Part 3 Photography Pistons Planning Plastic Pneumothorax Pollution Pool Diving Preparation Prepared diver Press Release Professional rights Provider course Pulmanologist Pulmonary Bleb Purge RAID South Africa RCAP Radio communications Rashes Recompression chamber Recompression Recycle Regulator failure Regulators Regulator Remote areas Renewable Report incidents Rescue training Resume diving Risk Assessments Risk assesments Risk elements Risk management SABS 019 Safety Stop Safety Saturation Diving Save our seas Science Scuba Air Quality Scuba Injury Scuba children Scuba dive Scuba health Scubalearners Sealife Skin Bends Skin outbreak Skin rash Snorkeling Snorkels Sodwana Bay Splits Squeezes Standars Supplemental oxygen Surgeries Surgery Tattoes Technical Diving The Bends The truth Thermal Notions Tides Tips and trick Transplants Travel tips Travel Tweezers Unconsciousness Underwater photographer Underwater pho Vaccines Vagus nerve Valsalva manoeuvers Vape Vaping Vasvagal Syncope Venting Volatile fuels Washout treatments Wastewater Water Weakness Wetsuit fitting White balance Winter Woman in diving Work of Breathing Wound dressings Wreck dive Wreckdiving Youth diver abrasion air-cushioned alert diver altitude anemia antibiotics antiseptics bandages bent-over barbell rows body art breathing air calories burn cardiovascular checklist chemo port child clearances closed circuit scuba currents cuts dead lift decompression algorithms decongestants dehydration dive injuries dive medicing dive ready child dive reflex dive tribe diver rescue diver training dive diving attraction doctors domestic travel dri-suits dry mucous membranes dry suits dry e-cigarettes ear spaces elearning electrolyte imbalance electroytes emergency action plans emergency assessment equalizing exposure injuries eyes fEMAL DIVERS fire rescue flexible tubing frediving gas bubble health hospital humidity immersion pulmonary edema (IPE join DAN knee longevity lower stress marine pathogens medical issues medical procedures medical risk assesment mental challenge minor illness mucous membranes nasal steroids nasal nematocysts newdivers nitrogen bubbles off-gassed operating theatre operations orthopeadic outgas pain perforation phillippines physical challenges pinched nerves plasters polyester-TPU polyether-TPU post dive preserve prevention rebreather mask rebreathers retinal detachment risk areas safety stops saturation scissors scuba equipment scuba single use sinus infections smoking snorkeling. spearfishing stings strength sub-aquatic swimmers ears tattoo care tecnical diver thermal protection training trimix unified standards vision impaired warmers water quality