Practicing for space underwater: inventing neutral buoyancy training, 1963-1968

Area of Science:

• Spaceflight Engineering
• Human Factors in Space Exploration
• Aquatic Training Systems

Background:

• The necessity of neutral buoyancy training for human spaceflight was not initially apparent.
• Early innovations in neutral buoyancy technology emerged from a NASA-funded project by Environmental Research Associates (ERA) starting in 1964.
• Despite initial dismissal, a critical spacewalk (EVA) incident in 1966 led to the rapid adoption of ERA's neutral buoyancy techniques by NASA's Houston center.

Purpose of the Study:

• To trace the historical development of neutral buoyancy technology for space missions.
• To identify the key organizations and innovations responsible for establishing neutral buoyancy training systems.
• To evaluate the long-term technological impact of different entities involved in neutral buoyancy research.

Main Methods:

• Historical research into NASA-funded projects and internal developments.
• Analysis of technological contributions from various organizations, including small companies and large aerospace corporations.
• Tracking the evolution of neutral buoyancy techniques from research to operational training centers.

Main Results:

• Environmental Research Associates (ERA) developed foundational neutral buoyancy innovations.
• NASA Marshall Space Flight Center independently developed similar techniques.
• Large aerospace corporations' contributions had minimal long-term technological impact.
• ERA and Marshall's work directly resulted in the establishment of two major NASA training centers.

Conclusions:

• Environmental Research Associates and NASA Marshall Space Flight Center deserve primary credit for the neutral buoyancy technological system.
• The development of neutral buoyancy training was a critical, though initially unrecognized, component of human spaceflight.
• Pioneering research by smaller entities and government centers proved more impactful than corporate endeavors in this specialized field.