Cold Water Diving
Definition
Cold water diving refers to scuba diving in water temperatures typically below 15°C (59°F), which requires additional thermal protection and special equipment.
More on Cold Water Diving
Cold water diving introduces unique challenges due to thermal stress and equipment performance. Hypothermia is a serious concern, so divers wear drysuits with insulating undergarments or thick wetsuits with hoods and gloves. Regulators must be cold-water rated to prevent free-flow due to ice buildup. Divers must also manage dexterity issues caused by gloves, longer pre-dive checks, and careful gear maintenance. Cold environments such as alpine lakes, quarries, or Arctic waters can offer stunning visibility and unique marine life, making the preparation worthwhile.
Frequently Asked Questions
A drysuit, thermal underlayers, 7mm hooded wetsuit (if drysuit isn’t available), thick gloves, cold-water regulator, and sometimes a redundant air source are essential.
Cold water can cause regulators to free-flow due to ice forming in the first stage. Using environmentally sealed, cold-water rated regulators reduces this risk.
Shivering, confusion, poor coordination, and fatigue are common signs. Divers should end the dive immediately if symptoms appear.
Yes, but oxygen exposure must be carefully monitored, especially in long, cold dives where exertion and exposure increase CNS risk.
Use insulated changing robes, hot drinks, windproof jackets, and warm vehicles or heated shelters during surface intervals.