Why is the cargo hold pressurized?

Commercial aeroplanes, both freight and passenger do not fly at a particular altitude without the support of pressurisation. For commercial aircraft, pressurisation provides shipping comfort, temperature control, and structural support of the consignments.



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According to estimates released by the Department of Transportation, less than 1 in 10,000 animals were injured, lost, or killed from flying. That said, the general safety of flying your pet as cargo doesn't discount the gravity of the fact that animals are sometimes harmed by flying in the cargo hold.

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The primary problem is low oxygen, says Professor Frances Ashcroft, a physiologist at Oxford University. Low pressure would cause little more than discomfort in the ears and eyes, but the associated drop in oxygen levels makes people pass out if they do not put their oxygen masks on within about 15 seconds.

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The Cabin Altitude of a pressurised aircraft is normally maintained at and altitude of 8,000 ft or less as a compromise between the physiological needs of the crew and passengers and the structural limitations of the aircraft. At 8,000 ft the use of supplemental oxygen is not required.

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Cargo travel is stressful for any pet, young or old. Senior pets, pets prone to anxiety, or those in general poor health are at increased risk of heart failure during travel. Please consult your vet before travel to ensure your dog or cat has a clean bill of health and is an appropriate candidate for cargo travel.

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The cargo hold is climate-controlled and will not be colder or hotter than cabin temperature. A pet-friendly airline will make sure your pet is comfortable at all times. Many airlines have temperature embargoes to deal with extreme temperatures.

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The cargo hold is pressurized and temperature controlled, with the temp usually at about 20 degrees colder than the cabin (at altitude).

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Air pressures on FedEx Express aircraft vary from as low as 8.3 psi at cruise altitude to as much as 14.7 psi on the ground.

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However, the entire fuselage of an airplane is pressurized, not only to prevent the crew and passengers from losing consciousness, but to maintain an efficient aircraft. The only aircraft which fly without pressurization systems are specialized military jets.

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The hold is pressurized. There is plenty of oxygen, but some airline cargo holds are not climate-controlled, Thompson said. During Sunday's flight from Charlotte to Washington, the Embraer E170 reached an altitude of 27,000 feet, according to FlightAware, an airline tracking website.

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Generally, the temperature in the hold is kept between 12 and 16 Celsius (54 and 61 Fahrenheit) depending on the aircraft and its cargo load.

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Flying in the cargo can be a harrowing experience for any animal. It's loud; it's turbulent; and it's full of bizarre sites, sounds, and smells. It's not uncommon for animals to injure themselves by trying to claw or chew their way through a carrier.

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Sedation risks for dogs and cats The cargo hold is temperature controlled and dark, and even the most excitable or anxious pets commonly calm down once they are settled in the hold. Sedating pets before travelling by air is a big no and is not recommended by experts.

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When it comes to flying with pets, one common question that pet owners often ask is whether they should sedate their pets during air travel. At PetRelocation, our straightforward answer is NO. Sedation carries various risks and is not recommended for pets during air travel.

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A common standard is 10 days. Some states have specific health requirements as well. Check with both the destination state and your departure state to ensure you have the necessary documents ahead of time.

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In most cases, if the layover is under 3 hours and if your pet is traveling in the cargo hold as checked baggage or air cargo, it will be transferred from one airplane to the next as long as you are staying on the same airline.

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This valve controls the cabin pressure and also acts as a safety relief valve, in addition to other safety relief valves. If the automatic pressure controllers fail, the pilot can manually control the cabin pressure valve, according to the backup emergency procedure checklist.

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Most aircraft cabins are pressurized to an altitude of 8,000 feet, called cabin altitude. Aircraft pilots have access to the mode controls of a cabin pressure control system and – if needed – can command the cabin to depressurize.

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