- Products
- Commercial divers’ equipment
- Compasses and watches
- Defence divers’ equipment
- Diving instrumentation
- Electrical diving equipment
- Escape and abandonment
- Gas and fluid systems
- Medical and safety equipment
- Recompression chambers
- Submarine intervention
- Submarine rescue
- Swimmer delivery
- Services
- Consultancy and personnel
- Engineering services
- Rescue and support
- Testing services
- Training services
- About
- Careers
- Company values
- Directors
- History
- Locations
- Trade bodies
- Events and Exhibitions Calendar
- HSEQ
- JFD terms and conditions
- Ancillary dive gear
- Commercial equipment and tools
- Commercial helmets, masks and SCUBA
- Commercial rebreathers
- Commercial surface supply
- Diver's suits and harnesses
- Contaminated water diving system
- BIBS manifold block
- Confined space rescue stretcher
- Divex back pressure regulator
- Divex interlock
- Diving bell survival kit
- DMAC 015 kits
- DMAS HyperSAT
- Hy-Fex hyperbaric fire extinguisher
- Hyperbaric flame detector
- Hyperlite hyperbaric stretcher
- Oxygen kits
- Ultralite 2 BIBS mask
- DSAR rescue vehicles
- Launch and recovery systems
- Multi-role launch and recovery system
- Submarine rescue bell
- Client representatives
- Dive and ROV system audits
- Diving technical expertise
- Offshore personnel
- Rescue certification
- Commercial development courses
- Defence training courses
- Medical training courses
- Product specific courses
- JFD successfully undertakes simultaneous operation [SIMOPS]
- Safety first for deep sea divers
- Top BAE award for JFD
- JFD wins £193M Indian Navy submarine rescue contract
- Archive
Altitude testing and trials
JFD maintains altitude testing facilities for the safe and efficient testing of equipment and manned altitude trials.
We have six chambers, varying in size from a small 190mm chamber to a 3m x 8m large work chamber, all capable of simulating depths below sea level, but equally capable of creating high altitude atmospheres and environmental conditions. The large work chamber can reach up to an impressive 55,000ft.
| Trial within DDC 1 | NHC Saturation System | Trial within DDC 1 | Hannah Miley - Olympic Swimmer |
Electronic components, equipment housings, casings and insulation can be influenced by the effects of differential pressures at altitude resulting in compromised functionality, performance and safety. Altitude testing and trials are the main methods used to ensure products are fit for purpose, and can survive whilst remaining functional during extreme environmental changes.
Previous jobs include testing:
- Fuel tanks for aircraft
- Navigational equipment
- Refuelling equipment
- Aircraft lighting
- Electronic recording equipment
- Aircraft seating
- Battery casings
- Aircraft fire extinguishers
- Cameras and housing
- Heart monitors
- Defibrillators
Manned altitude trials can also be run in our comfortably furnished chamber, fully fitted with communications, built in breathing systems (BIBS), toilets, showers, bunks and DVD video monitoring.
Athletes, including champion swimmer Hannah Miley, have used our chambers to explore the benefits of hypobaric exposure in relation to naturally enhancing their performance.
Previous jobs include testing:
- Medical devices for use by people living in high altitude areas, such as:
- Pregnancy test sticks
- Ovulation kits
- Medical devices for use at high altitude in planes, such as:
- Blood glucose monitors
- In vitro diagnostic devices
- Blood coagulation monitors
| Chamber | Dimensions (mm) |
| 100bar | |
| 200bar | |
| 220bar | |
| 800bar | |
| Work chamber | 3000 x 8000 |
All pressures are digitally recorded real-time ensuring the most accurate readings and results can be obtained. In-chamber cameras permit easy monitoring and the capability for video recording is also installed. Equipment can externally activate via penetrator plates carrying video and communications signals, and power.
We also have on-site mechanical and electronic engineers to assist with the integration and set up of chambers and equipment. Our excellent reputation in this field of testing is based on recognition from the industry. Every job is different and we provide quality advice, expertise and willingness to assist clients even in extended 24/7 operations.
| Trial within DDC 1 | NHC Saturation System | Trial within DDC 1 | Hannah Miley - Olympic Swimmer |
Electronic components, equipment housings, casings and insulation can be influenced by the effects of differential pressures at altitude resulting in compromised functionality, performance and safety. Altitude testing and trials are the main methods used to ensure products are fit for purpose, and can survive whilst remaining functional during extreme environmental changes.
Previous jobs include testing:
- Fuel tanks for aircraft
- Navigational equipment
- Refuelling equipment
- Aircraft lighting
- Electronic recording equipment
- Aircraft seating
- Battery casings
- Aircraft fire extinguishers
- Cameras and housing
- Heart monitors
- Defibrillators
Manned altitude trials can also be run in our comfortably furnished chamber, fully fitted with communications, built in breathing systems (BIBS), toilets, showers, bunks and DVD video monitoring.
Athletes, including champion swimmer Hannah Miley, have used our chambers to explore the benefits of hypobaric exposure in relation to naturally enhancing their performance.
Previous jobs include testing:
- Medical devices for use by people living in high altitude areas, such as:
- Pregnancy test sticks
- Ovulation kits
- Medical devices for use at high altitude in planes, such as:
- Blood glucose monitors
- In vitro diagnostic devices
- Blood coagulation monitors
| Chamber | Dimensions (mm) |
| 100bar | |
| 200bar | |
| 220bar | |
| 800bar | |
| Work chamber | 3000 x 8000 |
All pressures are digitally recorded real-time ensuring the most accurate readings and results can be obtained. In-chamber cameras permit easy monitoring and the capability for video recording is also installed. Equipment can externally activate via penetrator plates carrying video and communications signals, and power.
We also have on-site mechanical and electronic engineers to assist with the integration and set up of chambers and equipment. Our excellent reputation in this field of testing is based on recognition from the industry. Every job is different and we provide quality advice, expertise and willingness to assist clients even in extended 24/7 operations.
