Mastering Hydration: Avoiding the Mid-Flight Urge

While reading an article about the different systems and methods used for urinating during flight, I couldn’t help but recall the many stories shared by fellow pilots at the club where I fly.

The challenges associated with in-flight urination systems are numerous. Spillage inside the cockpit is not only unpleasant due to the odor but also potentially hazardous, as urine can cause corrosion if it’s not cleaned thoroughly. The drain hose must also be positioned carefully to prevent urine from flowing onto the underside of the glider, which can damage metal parts and the finish.

Another issue arises at high altitudes — urine can freeze. If the drainage system isn’t designed properly, a frozen tube can cause a serious mess the next time it’s used, soaking the pilot’s clothes and even the cockpit. Needless to say, it’s uncomfortable and far from ideal.

After considering various options — from onboard drainage systems to bottles or bags that some pilots use and then dispose of (something I strongly discourage) — I realized these solutions are flawed. There’s a real chance that the contents could blow back toward the glider, and tossing plastic bags from the air is clearly not an environmentally responsible practice.

After consulting with many experienced pilots and sports physicians, I discovered a healthier and simpler solution: staying properly hydrated before the flight, which eliminates the need to urinate for four to five hours, all while maintaining the body's good condition.

The key is to start flight day well-hydrated — drink water regularly from breakfast until about two hours before takeoff. During that time, eat protein and fruit, and sip water slowly and steadily while performing your pre-flight tasks — cleaning the glider, towing it to the runway, attending the briefing, and so on. By then, you’ll have consumed about 1.5 to 2 liters of water, which is enough.

Two hours before takeoff, stop drinking fluids. In the cockpit, bring a two-liter bottle or CamelBak of drinking water and a small 300 ml frozen bottle. The larger bottle is essential in case of an outlanding, to ensure you have enough water to stay hydrated. The frozen bottle should be kept within reach — when you feel thirsty, moisten your lips and take small sips.

Following this routine allows your body to stabilize before the flight — you can relieve yourself several times beforehand without risking dehydration. On very hot days, the frozen bottle is perfect for cooling off and easing mild thirst.

In summary: start the day well-hydrated, stop drinking two hours before launch, use the restroom as needed, and once airborne, you’ll be comfortable, hydrated, and free from the need to pee.

Warm regards,
Arturo Ferreyra
Glider and Airplane Pilot
Certified Glider Flight Instructor
Córdoba, Argentina

Banner Photo by Sean Franke

Arturo was born in Córdoba, Argentina, and has dreamed of flying for as long as he can remember. In 1992, he completed his glider pilot course and has been flying ever since. He later became a certified flight instructor and has dedicated much of his time to sharing his passion for soaring with others. Arturo has spent his entire flying career at the Córdoba Glider Club, where he enjoys every aspect of gliding — from competition flying to exploring the Andes mountains and providing flight instruction every Saturday throughout the year. He is deeply passionate about teaching and takes great pride in guiding students as they progress, culminating in the special moment when he can confidently send them on their first solo flight.