EVA 105: Fundamentals of Underwater Analog EVA

EVA 105: Fundamentals of Underwater Analog EVA


    Objectives: EVA 105 extends upon the introductory life support system curriculum presented in EVA 101 to include specific EVA space suit systems and test and validation procedures in an underwater analog environment. The course covers a historical analysis of specific US and Russian EVA space suit development programs, EVA space suit systems, laboratory test protocols, terminology and etiquette, EVA space suit test development, and design drivers of future EVA space suit systems. Students will be responsible to develop testing procedures based on tools and procedures developed in EVA 102 (Operational Space Medicine), EVA 103 (Planetary Field Geology), or for microgravity operations.

    Goals: To provide entry-level familiarization of operations and tasks associated with in-space EVA.


    1. Underwater environment: Classification: freediving, scuba diving, saturation diving, caisson works, Brief history of underwater testing for space application, Types of underwater tests, Benefits of underwater tests, Limitations of underwater testing, Certifications and requirements, Risks associated with underwater testing, Closed water vs open waters, Salt vs fresh water effects, Preserving wildlife and environment, Neutral buoyancy pools, Underwater habitats2. Human performance and limitations: Legal definition of a diving accident, Medical aspects of underwater activity, Saturation diving definition and associated problems, DCS, barotrauma, edema and other diving sickness, Saturation diving, Stings, bites, Blunt and crushing injuries, Sharp and penetrating wounds, bleeding, Loss of consciousness, Breathing problems, oxygen toxicity, breathing mixtures, Pressure equalization, Nitrogen narcosis, Diving accident treatment, DAN, first emergency response3. Underwater Procedures: Sample collection and documentation, Search patterns, Emergency response and contingency protocols, CPR, medevac, emergency depress, Rescue diving procedures, Saturation diving rescue procedures, Saturation diving pressurized invasive treatment4. Testing tools: Drills, Scoops, Carts, Pickers, Rock hammers and outcropping, Sample collection bags, Video cameras, photo cameras, handheld and mounted, In-situ measurements, Optical (laser) measurements and limitations, Measurements, Material performance and 3D printed tools, Explosives, Navigation

      5. Testing suits: Suit types and applications, Human performance and limitations, Certifications and requirements, Design considerations, Salt water influence on material and metalic elements (corrosion), Hands, gloves and dexterity, Interfaces and operability, Operational procedures and leak checks, Stowage and handling, Light system and cooling, Communication, Life support, CO2 scrubbers and rebreathers, Biomedical parameter monitoring, Contingency situations (air starvation, CO2 buildup, leaks, ear-pressure, net entanglement, loosing buoyancy, accidental ascent), Suit floatation system, emergency egress.

      6. EVA training: EVA pre-familiarization, Orientation and navigation, Tool handling, Manipulating massive objects, Tethers, traversal and transitions, Vocabulary and communicating intentions, Contingency procedures, Airlock egress and ingress (nominal, and contingency with incapacitated astronaut), Photo-shoots without viewfinder

      7. Vehicle utilization: ROVs and AUVs, Diver Propulsion Vehicles, Crewed vehicles: one person, multi-crew, Pressure, materials and safety-margins, Propellers and propellants, Light systems and cooling, Life support systems, Communication, Grippers and manipulators, Human interfaces, Human robotic interaction, Safety protocols, Contingency situations

      8. Reduced mobility and movement: Achieving neutral buoyancy, Loosing neutral buoyancy, Water resistance, Joint movement range, Reachability, Free-floating vs on-ground tests, Anchoring, traversing and translations, Ladders, ropes, ramps, climbing, boulders, Underwater navigation

      9. Underwater habitats: Architectural variations, History of underwater habitation, Theoretical model, Life support systems, Maintenance problems, Crew composition, Accidents

      10. Isolation studies: Dexterity and performance evaluation, Cognitive and psychomotor evaluation, Research Problems, Crew selection, Sociodynamics, Conflicts and resolutions, Work overload and productivity.

    EVA Operations Field Campaign

    Student Surface Preparation

    1. Surface suit/system familiarization
    2. Safety briefing – hand signals, loss of comm, etc
    3. One-g class room prep-training
      1. Tool familiarization
      2. Tether protocols
        1. Astronaut tethers
        2. Tool/hardware/payload tethers
      3. Procedures
        1. EVA specific
        2. Pool specific
      4. Communications
      5. Hardware familiarization
      6. EVA Ops briefings
      7. Space vs. pool EVA ∆s

    Course Outline

    1. Surface prep, pool prep, and suit up
    2. Safety brief
    3. Enter water and ingress airlock
    4. Start Exercise
      1. Depressurize airlock
      2. Open airlock hatch
      3. Translate to tool box
      4. Retrieve tools for Task #1
      5. Translate to work station #1
      6. Perform Task #1
      7. Translate to tool box
      8. Stow tools
      9. Retrieve tools for Task #2
      10. Retrieve “payload”
      11. Translate to work station #2
      12. Perform Task #2
      13. Translate to tool box
      14. Stow Task #2 tools
      15. Retrieve Task #3 Tools
      16. Translate to work station #3
      17. Perform Task #3
      18. Emergency Scenario
      19. Translate to airlock
      20. Ingress airlock
      21. Close hatch
      22. Repressurize
    5. End Exercise
    6. Debrief

    Task #1 – Tether protocols, translation, tool manipulation

    • Retrieve socket wrench and appropriate sockets
    • Translate to work site #1 observing proper tether protocols for tools and self
    • Configure wrench with proper socket following tether protocols
    • Turn bolts w/out foot restraint
    • Stow tools
    • Attach electrical connector
    • Translate to tool box observing proper tether protocols for tools and self
    • Stow tools

    Task #2 – Payload Installation

    • Retrieve tools
    • Retrieve “payload”
    • Translate to work site #2 observing proper tether protocols for tools, payload, and self
    • Enter foot restraint
    • Install payload and secure
    • Stow tools
    • Translate to tool box observing proper tether protocols for tools and self
    • Stow tools

    Emergency (e.g. suit leak)

    • Follow emergency checklist
    • Stow tools
    • Translate to airlock
    • Close hatch
    • Repressurize airlock

    2021 Course Schedule


    17apr(apr 17)6:30 pm21(apr 21)5:00 pmPoSSUM Scientist-Astronaut Class 2001 and 2002

    19apr(apr 19)8:00 am23(apr 23)5:00 pm2020 PoSSUM Academy - Red Sprite Group

    24apr(apr 24)6:30 pm28(apr 28)5:00 pmPoSSUM Scientist-Astronaut Class 2003 and 2101

    26apr(apr 26)8:00 am30(apr 30)5:00 pm2020 PoSSUM Academy - Blue Jet Group


    01may8:00 am05(may 5)5:00 pmOPS 102 Spacecraft Egress and Rescue Operations On-SiteOn-site compliment to OPS 102 course providing aircraft egress and sea survial training to complement post-landing human space flight system engineering instruction

    06may(may 6)8:00 am09(may 9)5:00 pmFeaturedBIO 104: Advanced Egress - Spacesuit Landing and Post-Landing Testing

    10may(may 10)8:00 am12(may 12)5:00 pmOPS 104 On-Site Mission Simulation TrainingOn-Site compliment to OPS 104 Orbital Mechanics and Mission Simulation using the IIAS Orion simulator to provide high-fidelity simulation of ISS rendezvous and docking missions.

    13may(may 13)8:00 am16(may 16)5:00 pmEVA 105 Neutral Buoyancy Laboratory EVA Operations CampaignOn-Site compliment to EVA 105 Fundamentals of Underwater EVA Operations using the IIAS Neutral Buoyancy Laboratory. This NAUI-certified prepares on to evaluate actual EVA space suits in analog underwater conditions.

    17may(may 17)8:00 am21(may 21)5:00 pmFeaturedBIO 103 Microgravity Research CampaignMicrogravity Research Campaign supporting the IIAS BIO 103 Program

    25may(may 25)8:00 am28(may 28)5:00 pmEVA 102 Operational Space Medicine Field CampaignField component to cover wilderness medicine in extreme environments, culminating with a 4-day on-site lab portion devoted to triage, scenarios and skills pertaining to wilderness medicine

    29may01junEVA 103 Planetary Field Geology Field CampaignEVA 103 course covers the requirements and design considerations for EVA systems and tools for conducting planetary field geology


    06jun(jun 6)8:00 am12(jun 12)5:00 pmFTE 102 Fixed-Wing Performance Flight Test CampaignOn-Site compliment to FTE 102 Fixed-Wing Performance Flight Testing using Turbo Mooney aircraft.

    13jun(jun 13)8:00 am19(jun 19)5:00 pmFTE 103 Fixed-Wing Stability and Control Flight Test CampaignOn-Site compliment to the FTE 102 Fixed-Wing Stability and Control Flight Test Course using Turbo Mooney, Piper Twin, and Pitts S2B aircraft.


    10julAll Day20FeaturedAER 103 Noctilucent Cloud Imagery Field Research CampaignField campaign as part of AER 103, Airborne Noctilucent Cloud Imagery course to study noctilucent cloud formations through coordinated ground, airborne, and balloon observations.


    01nov8:00 am05(nov 5)5:00 pmFeaturedEVA 104 Gravity-Offset EVA Space Suit Evaluation CampaignGravity-offset research campaign to evaluate the Final Frontier Design EVA space suit by applying the tools and techniques developed through EVA 102 and EVA 103 courses

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