Lunar functions¶
Summary. ADD Rev C lists 208 lunar functions in Appendix B.2.2 (pp. 117–127), each one of
the "Actions that an architecture would perform to complete the desired use case"
(ADD Rev C, p. 17). These are the IDs, such as
FN-P-101 L, that technology gaps, Moon Base functional gaps and the ADD's element function
mappings (B.3) cite. This page gives every function in NASA's wording, by the letter in the ID.
Two source-made columns show which are named by a technology gap (41) and which the Moon Base Users
Guide lists for Phase 1 (31).
How to read the IDs is on Use cases and functions; the use cases are on Lunar use cases, and the Mars list, numbered independently, on Mars functions. The two columns overlap on 10 functions (At a glance). The Users Guide prints one of its 31 IDs, FN-P-102 L, with the ADD's title for a different function, FN-P-202 L (below; open question 40).
How this page is built¶
- Titles are quoted from the ADD's table "Lunar Function", and every page (pp. 117–127) was
checked against the PDF.
- Where the text layer runs words together at a line break ("longdurations"), the rendered form is used ("long-durations").
- On p. 126 the text layer separates FN-U-302 L to FN-U-306 L from their titles, so those pairings were read from the PDF.
- The ADD's own spellings are kept, such as "payloads(s)" and "mid-(month+)".
- Order is the ADD's. The headings and their sub-architecture names are the wiki's reading of the ADD's p. 40 table, as on Lunar use cases.
- "Tech gaps" column. Derived from the tech-gap spreadsheet's "Architecture Traceability: Use
Cases & Functions" field. A gap is listed when it names this function; the use case it is paired
with is in brackets (tech gaps spreadsheet).
- Not shown: gaps that pair a use case with "All FN", because Appendix B.2 doesn't say which functions belong to which use case. For example, #0901 and #0903 trace to the power use cases only through "All FN", so no power function shows a gap here. Those gaps are on Lunar use cases. The lunar decomposition spreadsheet does pair functions with use cases, and the gaps index expands the "All FN" entries from it, labeled as built from the spreadsheet (gaps index).
- "Moon Base Phase 1" column. Shows the group under which the Users Guide lists the function as a Phase 1 functional gap (Users Guide, pp. 8–10; Phase 1 functional gaps). The guide names the ID, so this link is the guide's own. Its group can differ from the ID's letter: FN-M-401 L, for example, is under robotics.
-
Elements are on other pages, not here (no element column, open question 44):
- Which elements perform each function (ADD Appendix B.3, pp. 148–165): each element page, under "Functions (ADD Appendix B.3)"
- Which functions no element performs (B.5, pp. 167–184): in full on Lunar function allocation, with the lunar objective decomposition spreadsheet's own allocation, headed "FORWARD WORK"
The two agree closely. B.5 lists 75 of the spreadsheet's 76 "Unallocated" functions. Four functions, FN-G-106 L, FN-G-107 L, FN-C-205 L and FN-M-402 L, appear in no ADD table for Foundational Exploration (Lunar function allocation). The use cases and objectives above the functions are on Lunar objectives. The spreadsheet's 208 titles match this page apart from print differences (source page).
At a glance¶
| Letter | Sub-architecture (wiki's reading of p. 40) | Pages | Functions | Named by a tech gap | Moon Base Phase 1 (by ID) |
|---|---|---|---|---|---|
| T | Transportation Systems | 117–119 | 41 | 1 | 2 |
| G | Infrastructure Support | 119–120 | 9 | 0 | 0 |
| H | Habitation Systems | 120 | 7 | 4 | 3 |
| X | Human Systems | 120 | 6 | 4 | 1 |
| L | Logistics Systems | 120–121 | 9 | 5 | 5 |
| P | Power Systems | 121 | 11 | 0 | 5 |
| M | Mobility Systems | 121–123 | 28 | 4 | 4 |
| C | C&PNT Systems | 123 | 13 | 2 | 4 |
| D | Data Systems and Management | 123–124 | 10 | 2 | 0 |
| A | Autonomous Systems and Robotics | 124–125 | 16 | 7 | 6 |
| I | ISRU Systems | 125 | 15 | 5 | 0 |
| U | Utilization Systems | 125–127 | 43 | 7 | 1 |
| Total | 117–127 | 208 | 41 | 31 |
The Moon Base column counts IDs as the guide prints them, so FN-P-102 L is counted and FN-P-202 L is not (below). The 10 functions on both lists are FN-H-102 L, FN-H-201 L, FN-X-103 L, FN-L-101 L, FN-L-201 L, FN-L-205 L, FN-L-301 L, FN-C-201 L, FN-A-201 L and FN-A-302 L. These are the same 10 that the gap pages already cross-reference (open question 11).
T: Transportation (pp. 117–119)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-T-101 L | Transport crew from Earth to cislunar space | ||
| FN-T-102 L | Transport crew from cislunar space to lunar surface sites in the south pole region | ||
| FN-T-103 L | Transport crew from cislunar space to distributed sites outside of the south pole region on the lunar surface | ||
| FN-T-104 L | Transport crew from the lunar surface to cislunar space | ||
| FN-T-105 L | Transport crew from cislunar space to Earth | ||
| FN-T-106 L | Rendezvous, proximity operations, mating and unmating of assets in cislunar space | #1001 (UC-L-202 L) | |
| FN-T-107 L | Enable crew habitation during transit from Earth to cislunar space | ||
| FN-T-108 L | Enable crew habitation during transit from cislunar space to lunar surface sites in the south pole region | ||
| FN-T-109 L | Enable crew habitation during transit from cislunar space to distributed sites outside of the south pole region on the lunar surface | ||
| FN-T-110 L | Enable crew habitation during transit from the lunar surface to cislunar space | ||
| FN-T-111 L | Enable crew habitation during transit from cislunar space to Earth | ||
| FN-T-112 L | Enable abort(s) to safety | ||
| FN-T-201 L | Transport a limited amount of cargo (100s of kg) from Earth to south pole region sites on the lunar surface | Transportation (cargo) | |
| FN-T-202 L | Transport a moderate amount of cargo (1000s of kg) from Earth to south pole region sites on the lunar surface | Transportation (cargo) | |
| FN-T-203 L | Transport a limited amount of cargo (100s of kg) from Earth to distributed sites outside of the south pole region on the lunar surface | ||
| FN-T-204 L | Transport a moderate amount of cargo (1000s of kg) from Earth to distributed sites outside of the south pole region on the lunar surface | ||
| FN-T-205 L | Transport a limited amount of cargo (100s of kg) from Earth to the far side of the lunar surface | ||
| FN-T-206 L | Transport large asset(s) from Earth to the lunar surface | ||
| FN-T-207 L | Transport a small amount of cargo (10s of kg) from the lunar surface to Earth | ||
| FN-T-208 L | Transport a large amount of cargo (100s of kg) from the lunar surface to Earth | ||
| FN-T-209 L | Transport a small amount of cargo (10s of kg) from the lunar surface to cislunar space | ||
| FN-T-210 L | Transport a large amount of cargo (100s of kg) from the lunar surface to cislunar space | ||
| FN-T-211 L | Transport a small amount of cargo (10s of kg) from cislunar space to Earth | ||
| FN-T-212 L | Transport a large amount of cargo (100s of kg) from cislunar space to Earth | ||
| FN-T-213 L | Transport cargo from Earth to cislunar space | ||
| FN-T-214 L | Provide delivery of live, actively growing biological specimens to cislunar space, including late load of cargo prior to launch | ||
| FN-T-215 L | Transport cargo from Earth to assets in deep space | ||
| FN-T-216 L | Deliver free flying asset(s) from Earth to cislunar space | ||
| FN-T-217 L | Transport exploration asset(s) from Earth to cislunar space | ||
| FN-T-301 L | Provide resources to condition refrigerated sample containers during transit from the lunar surface to Earth | ||
| FN-T-302 L | Provide resources to condition frozen sample containers during transit from the lunar surface to Earth | ||
| FN-T-303 L | Provide resources to condition cryogenic sample containers during transit from the lunar surface to Earth | ||
| FN-T-304 L | Provide resources to condition refrigerated sample containers during transit from the lunar surface to cislunar space | ||
| FN-T-305 L | Provide resources to condition frozen sample containers during transit from the lunar surface to cislunar space | ||
| FN-T-306 L | Provide resources to condition cryogenic sample containers during transit from the lunar surface to cislunar space | ||
| FN-T-307 L | Provide resources to condition refrigerated sample containers during transit from cislunar space to Earth | ||
| FN-T-308 L | Provide resources to condition frozen sample containers during transit from cislunar space to Earth | ||
| FN-T-309 L | Provide resources to condition cryogenic sample containers during transit from cislunar space to Earth | ||
| FN-T-401 L | Provide precision landing for crew transport to the lunar surface | ||
| FN-T-402 L | Provide precision landing for cargo transport to the lunar surface | ||
| FN-T-403 L | Enable landing on the lunar surface under all lighting conditions |
FN-T-103 L is the function whose allocation to UC-T-103 L Revision B.1 removed; the revision history quotes its title in lower case, otherwise as here (ADD Rev C, p. 4).
G: Infrastructure Support (pp. 119–120)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-G-101 L | Provide ground services on Earth | ||
| FN-G-102 L | Stack and integrate system(s) on Earth | ||
| FN-G-103 L | Manage consumables and propellant | ||
| FN-G-104 L | Enable vehicle launch(es) | ||
| FN-G-105 L | Enable multiple launch attempts for vehicle(s) | ||
| FN-G-106 L | Provide ground services on Earth to support large nuclear assets | ||
| FN-G-107 L | Enable vehicle launch(es) to support large nuclear assets | ||
| FN-G-201 L | Recover crew after Earth landing | ||
| FN-G-202 L | Recover cargo after Earth landing |
H: Habitation (p. 120)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-H-101 L | Enable a pressurized, habitable environment on the lunar surface for short durations (days to weeks) | Habitation | |
| FN-H-102 L | Enable a pressurized, habitable environment on the lunar surface for mid-duration (month+) use | #0303 (UC-H-102 L); #0306 (UC-H-102 L) | Habitation (guide: "moderate duration") |
| FN-H-103 L | Enable a pressurized, habitable environment in cislunar space | ||
| FN-H-104 L | Enable a pressurized, habitable environment in cislunar space for mid-durations (month+) | #0303 (UC-H-103 L) | |
| FN-H-105 L | Enable a pressurized, habitable environment in cislunar space for long-durations (year+) | #0303 (UC-H-104 L) | |
| FN-H-201 L | Operate habitation system(s) in uncrewed mode between crewed missions on the lunar surface | #0301 (UC-H-105 L) | Habitation |
| FN-H-202 L | Operate habitation system(s) in uncrewed mode between crewed missions in cislunar space |
X: Human Systems (p. 120)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-X-101 L | Provide hardware for crew medical care on the lunar surface | #0405 (UC-X-101 L) | |
| FN-X-102 L | Provide hardware for crew medical care in cislunar space | #0405 (UC-X-102 L) | |
| FN-X-103 L | Provide crew countermeasure system(s) to support the crew for mid-durations (month+) on the lunar surface | #0401, #0402, #0403, #0404, #0405 (all UC-X-103 L) | Habitation (guide: "moderate durations") |
| FN-X-104 L | Provide crew countermeasure system(s) to support the crew for mid-(month+) to long-durations (year+) in cislunar space | #0401, #0402, #0403, #0404, #0405 (all UC-X-104 L) | |
| FN-X-201 L | Provide in-mission crew training on the lunar surface | ||
| FN-X-202 L | Provide in-mission crew training in cislunar space |
L: Logistics (pp. 120–121)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-L-101 L | Provide mating between pressurized assets on the lunar surface | #0807 (UC-L-201 L) | Logistics |
| FN-L-201 L | Transfer pressurized cargo into habitable assets on the lunar surface | #0701 (UC-L-201 L) | Logistics |
| FN-L-202 L | Transfer pressurized cargo into habitable assets in cislunar space | ||
| FN-L-203 L | Transfer water to habitable assets on the lunar surface | Logistics | |
| FN-L-204 L | Transfer water to habitable assets in cislunar space | ||
| FN-L-205 L | Transfer gases to habitable assets on the lunar surface | #0807 (UC-L-201 L) | Logistics |
| FN-L-206 L | Transfer gases to habitable assets in cislunar space | ||
| FN-L-301 L | Manage waste from habitable asset(s) on the lunar surface | #0702 (UC-L-201 L) | Habitation |
| FN-L-302 L | Manage waste from habitable asset(s) in cislunar space | #0702 (UC-L-202 L) |
P: Power (p. 121)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-P-101 L | Generate power in the south pole region on the lunar surface | Power | |
| FN-P-102 L | Generate power at multiple distributed locations outside of the south pole region on the lunar surface | Named by the guide, but with FN-P-202 L's title (below) | |
| FN-P-201 L | Store energy at multiple distributed locations outside of the south pole region on the lunar surface | ||
| FN-P-202 L | Store energy in the south pole region on the lunar surface | Not named by the guide; its title is the one the guide prints for FN-P-102 L | |
| FN-P-301 L | Distribute power in the south pole region on the lunar surface | Power | |
| FN-P-302 L | Distribute power at multiple distributed locations outside of the south pole region on the lunar surface | ||
| FN-P-303 L | Distribute power to utilization payloads and/or equipment in cislunar space | ||
| FN-P-304 L | Distribute power to utilization payloads and/or equipment in deep space | ||
| FN-P-305 L | Provide bi-directional power exchange capability | ||
| FN-P-401 L | Provide power for deployed surface utilization payloads(s) and/or equipment | Power | |
| FN-P-402 L | Provide power for deployed external surface utilization payloads(s) and/or equipment for mid- (month+) to long-durations (year+) | Power |
The Lunar Nuclear Fission System's three functions are FN-P-101 L, FN-P-301 L and FN-P-401 L (2025 Architecture Update, p. 7; ADD p. 158).
The lunar decomposition spreadsheet gives FN-P-102 L and FN-P-202 L the ADD's titles above. It puts them under different use cases: FN-P-202 L (South Pole storage) under UC-P-101 L with FN-P-101 L, and FN-P-102 L (distributed generation) under UC-P-102 L with FN-P-201 L. Its key names the P groups 100 "Generation" and 200 "Storage" (source page). None of this says which ID the Users Guide meant (open question 40).
M: Mobility (pp. 121–123)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-M-101 L | Enable crew lunar surface extravehicular activity in sunlit areas and non-PSRs | #0801 (UC-M-101 L) | |
| FN-M-102 L | Enable crew lunar surface extravehicular activity in PSRs | ||
| FN-M-103 L | Enable crew lunar surface extravehicular activities at the lunar far side region | ||
| FN-M-104 L | Enable crew extravehicular activity in cislunar space | ||
| FN-M-201 L | Enable the cleaning of EVA equipment and tools | ||
| FN-M-202 L | Enable maintaining and servicing of the EVA system in a habitable environment | ||
| FN-M-203 L | Ingress/egress from habitable asset(s) to lunar surface vacuum | #0807 (UC-M-101 L) | |
| FN-M-301 L | Ingress/egress from habitable asset(s) to cislunar vacuum | ||
| FN-M-302 L | Enable local unpressurized surface mobility in sunlit areas and non-PSRs in the south pole region on the lunar surface | Mobility | |
| FN-M-303 L | Enable local unpressurized surface mobility in sunlit areas and non-PSRs at distributed sites on the lunar surface | ||
| FN-M-304 L | Enable local unpressurized surface mobility in PSRs at the south pole region of the lunar surface | Mobility | |
| FN-M-305 L | Enable pressurized surface mobility in sunlit areas and non-PSRs | ||
| FN-M-401 L | Unload a limited amount of cargo (100s of kg) on the lunar surface | Robotics | |
| FN-M-402 L | Unload a moderate amount of cargo (1000s of kg) on the lunar surface | ||
| FN-M-403 L | Unload large assets on the lunar surface | #0808 (UC-M-401 L) | |
| FN-M-501 L | Reposition a limited amount of cargo (100s of kg) in the south pole region on the lunar surface | Robotics | |
| FN-M-502 L | Reposition a limited amount of cargo (100s of kg) at distributed sites on the lunar surface | ||
| FN-M-503 L | Reposition a moderate amount of cargo (1000s of kg) at the south pole region on the lunar surface | ||
| FN-M-504 L | Reposition a small amount of unconditioned samples and containers (10s of kg) on the lunar surface | ||
| FN-M-505 L | Reposition a large amount of unconditioned samples and containers (100s of kg) on the lunar surface | ||
| FN-M-506 L | Reposition a small amount of refrigerated samples and containers (10s of kg) on the lunar surface | ||
| FN-M-507 L | Reposition a large amount of refrigerated samples and containers (100s of kg) on the lunar surface | ||
| FN-M-508 L | Reposition a small amount of frozen samples and containers (10s of kg) on the lunar surface | ||
| FN-M-509 L | Reposition a large amount of frozen samples and containers (100s of kg) on the lunar surface | ||
| FN-M-510 L | Reposition a large amount of cryogenic samples and containers (100s of kg) on the lunar surface | ||
| FN-M-601 L | Relocate exploration assets at the south pole region of the lunar surface | #0808 (UC-M-601 L) | |
| FN-M-602 L | Relocate exploration assets at distributed locations outside of the south pole region on the lunar surface | ||
| FN-M-701 L | Operate mobility system(s) in uncrewed mode between crew surface missions |
C: Communications and PNT (p. 123)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-C-101 L | Provide communications and data exchange between the lunar surface and Earth | C&PNT | |
| FN-C-102 L | Provide communications and data exchange between Earth and cislunar space | ||
| FN-C-103 L | Provide communications and data exchange between assets on the lunar surface | C&PNT | |
| FN-C-104 L | Provide communications and data exchange between Earth and deep space | ||
| FN-C-105 L | Provide high bandwidth, high availability communications and data exchange between the lunar surface and Earth | C&PNT | |
| FN-C-106 L | Provide high bandwidth, high availability communications and data exchange between cislunar space and the Earth | ||
| FN-C-107 L | Provide high bandwidth, high availability communications and data exchange between assets on the lunar surface | #0103 (UC-C-102 L) | |
| FN-C-108 L | Provide high bandwidth, high availability communications and data exchange between cislunar space and the lunar surface | ||
| FN-C-201 L | Provide position, navigation, and timing services at the south pole region on the lunar surface | #0101 (UC-M-601 L, UC-C-202 L, UC-C-203 L) | C&PNT |
| FN-C-202 L | Provide position, navigation, and timing services at distributed sites on the near side and outside of the south pole region on the lunar surface | ||
| FN-C-203 L | Provide position, navigation, and timing services at the far side and outside the south pole region on the lunar surface | ||
| FN-C-204 L | Provide position, navigation, and timing services in cislunar space | ||
| FN-C-205 L | Provide a coordinated lunar time scale |
D: Data Systems and Management (pp. 123–124)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-D-101 L | Collect, store, and locally distribute data on the lunar surface | ||
| FN-D-102 L | Collect, store, and locally distribute data in cislunar space | ||
| FN-D-103 L | Collect, store, and locally distribute large volumes of data on the lunar surface sufficient to perform real time analysis for in situ decision making | ||
| FN-D-104 L | Collect, store, and locally distribute large volumes of data in cislunar space sufficient to perform real time analysis for in situ decision making | ||
| FN-D-105 L | Provide data capabilities, including protection for communication, and interface to support crew medical care on the lunar surface | #0405 (UC-X-101 L) | |
| FN-D-106 L | Provide data capabilities, including protection for communication, and interface to support crew medical care in cislunar space | #0405 (UC-X-102 L) | |
| FN-D-201 L | Process data locally on the lunar surface | ||
| FN-D-202 L | Process data locally in cislunar space | ||
| FN-D-203 L | Process large volumes of data locally on the lunar surface sufficient to perform real time analysis for in situ decision making | ||
| FN-D-204 L | Process large volumes of data locally in cislunar space sufficient to perform real time analysis for in situ decision making |
A: Autonomous Systems and Robotics (pp. 124–125)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-A-101 L | Provide robotic systems to assist crew in sunlit areas and non-PSRs on the lunar surface | #1005 (UC-A-104 L) | |
| FN-A-102 L | Provide robotic systems to assist crew in PSRs on the lunar surface | #1005 (UC-A-101 L) | |
| FN-A-103 L | Provide a robotic system capable of conducting reconnaissance | Mobility | |
| FN-A-104 L | Perform robotic manipulation of payloads, logistics, and/or equipment on the lunar surface | Robotics | |
| FN-A-105 L | Interface robotic system(s) with logistics carriers on the lunar surface | Robotics | |
| FN-A-106 L | Enable repositioning of externally mounted utilization payloads in cislunar space | ||
| FN-A-201 L | Control robotic system(s) in sunlit areas and non-PSRs on the lunar surface from Earth and/or cislunar space | #0501 (UC-A-105 L); #0805 (UC-A-201 L) | Robotics (guide's title ends "from Earth") |
| FN-A-202 L | Control robotic system(s) in PSRs on the lunar surface from Earth and/or cislunar space | #0201 (UC-A-101 L, UC-A-201 L); #0804 (UC-A-101 L, UC-A-106 L) | |
| FN-A-203 L | Control robotic system(s) in cislunar space from Earth and/or cislunar space | ||
| FN-A-204 L | Control robotic system(s) in cislunar space by in-situ crew | #1001 (UC-A-107 L) | |
| FN-A-301 L | Monitor robotic system(s) performance and health | #1002 (UC-A-201 L) | |
| FN-A-302 L | Provide safeguards for automated asset(s) operating near crew | #1002, #1004, #1005 (all UC-A-301 L) | Robotics |
| FN-A-401 L | Command and control asset(s) from Earth on the lunar surface during uncrewed periods | Robotics | |
| FN-A-402 L | Command and control asset(s) from Earth in cislunar space during uncrewed periods | ||
| FN-A-403 L | Transition assets between crewed and uncrewed mode on the lunar surface | ||
| FN-A-404 L | Transition assets between crewed and uncrewed mode in cislunar space |
I: ISRU (p. 125)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-I-101 L | Collect water/ice from the south pole region of the lunar surface | ||
| FN-I-102 L | Produce scalable quantities of oxygen from lunar regolith | ||
| FN-I-103 L | Produce scalable quantities of water from in-situ materials on the lunar surface | ||
| FN-I-104 L | Conduct ISRU utilization payload and/or equipment operations on the lunar surface | ||
| FN-I-105 L | Store oxygen on the lunar surface | #1106 (UC-I-102 L) | |
| FN-I-106 L | Store collected water/ice on the lunar surface | ||
| FN-I-107 L | Transport scalable quantities of oxygen produced to exploration elements | #1107 (UC-I-102 L) | |
| FN-I-108 L | Transport scalable quantities of water produced to exploration elements | ||
| FN-I-201 L | Collect regolith at sub-scale to support demonstration using scalable capability | ||
| FN-I-202 L | Conduct regolith recovery demonstration utilization payload and/or equipment operations on the lunar surface | ||
| FN-I-203 L | Provide storage for collected regolith | ||
| FN-I-204 L | Process and refine scalable quantities of in-situ feedstock resources on the lunar surface | ||
| FN-I-205 L | Conduct autonomous construction utilization payload and/or equipment operations on the lunar surface | #0504 (UC-I-201 L); #0505 (UC-I-202 L) | |
| FN-I-206 L | Conduct advanced manufacturing utilization payload and/or equipment operations on the lunar surface | #0502 (UC-I-204 L) | |
| FN-I-207 L | Conduct regolith-based additive/subtractive manufacturing utilization payload and/or equipment operations on the lunar surface | #0502 (UC-I-203 L) |
The ISRU oxygen, water and metals gaps (#0601, #0603, #0604) and #0605 trace to ISRU use cases through "All FN", so they don't show against a function here (Lunar use cases).
U: Utilization (pp. 125–127)¶
| ID | Lunar function | Tech gaps | Moon Base Phase 1 |
|---|---|---|---|
| FN-U-101 L | Observe and sense the lunar surface from lunar orbit | ||
| FN-U-102 L | Capture imagery on the lunar surface | ||
| FN-U-103 L | Conduct resource identification utilization payload and/or equipment operations on the lunar surface | Mobility | |
| FN-U-201 L | Provide locations to host utilization payload(s) and/or equipment in deep space | ||
| FN-U-202 L | Provide extravehicular utilization accommodation, interfaces, and resources, operable during crewed and uncrewed increments, in cislunar space | ||
| FN-U-203 L | Provide extravehicular utilization accommodation, interfaces, and resources, operable during crewed and uncrewed increments, on the lunar surface | ||
| FN-U-204 L | Provide intravehicular activity facilities, utilization accommodation, and resources, operable during crewed and uncrewed increments, on the lunar surface | ||
| FN-U-205 L | Provide intravehicular activity facilities, utilization accommodation, and resources, operable during crewed and uncrewed increments, in cislunar space | ||
| FN-U-206 L | Provide intravehicular utilization accommodation and resources during crew transit between Earth and cislunar space | ||
| FN-U-301 L | Provide capability to recover and package subsurface samples, maintaining scientific integrity of the samples, from non-PSRs and sunlit regions on the lunar surface | ||
| FN-U-302 L | Provide capability to recover and package subsurface samples, maintaining scientific integrity of the samples, from PSRs on the lunar surface | ||
| FN-U-303 L | Provide capability to recover and package surface and/or shallow subsurface samples, maintaining scientific integrity of the samples, from non-PSRs and sunlit regions on the lunar surface | ||
| FN-U-304 L | Provide capability to recover and package surface and/or shallow subsurface samples, maintaining scientific integrity of the samples, from PSRs on the lunar surface | ||
| FN-U-305 L | Provide capability to recover and package deep subsurface samples, including drill cores, maintaining scientific integrity of the samples, from non-PSRs and sunlit regions on the lunar surface | ||
| FN-U-306 L | Provide capability to recover and package deep subsurface samples, including drill cores, maintaining scientific integrity of the samples, from PSRs on the lunar surface | ||
| FN-U-401 L | Stow collected unconditioned samples on exploration assets while on the lunar surface, while maintaining scientific integrity of the samples | ||
| FN-U-402 L | Stow refrigerated samples during transport from the Lunar Surface to Earth, while maintaining scientific integrity of samples | ||
| FN-U-403 L | Stow frozen samples during transport from the Lunar Surface to Earth, while maintaining scientific integrity of samples | ||
| FN-U-404 L | Stow cryogenic samples during transport from the Lunar Surface to Earth, while maintaining scientific integrity of samples | ||
| FN-U-405 L | Stow refrigerated samples during transport from the Lunar Surface to cislunar space, while maintaining scientific integrity of samples | ||
| FN-U-406 L | Stow frozen samples during transport from the Lunar Surface to cislunar space, while maintaining scientific integrity of samples | ||
| FN-U-407 L | Stow cryogenic samples during transport from the Lunar Surface to cislunar space, while maintaining scientific integrity of samples | ||
| FN-U-408 L | Stow refrigerated samples during transport from cislunar space to Earth, while maintaining scientific integrity of samples | ||
| FN-U-409 L | Stow frozen samples during transport from cislunar space to Earth, while maintaining scientific integrity of samples | ||
| FN-U-410 L | Stow cryogenic samples during transport from cislunar space to Earth, while maintaining scientific integrity of samples | ||
| FN-U-411 L | Stow collected refrigerated samples on exploration assets while on the lunar surface, while maintaining scientific integrity of the samples | ||
| FN-U-412 L | Stow collected frozen samples on exploration assets while on the lunar surface, while maintaining scientific integrity of the samples | ||
| FN-U-413 L | Stow collected cryogenic samples on exploration assets while on the lunar surface, while maintaining scientific integrity of the samples | ||
| FN-U-414 L | Provide resources to condition refrigerated sample containers on the lunar surface | ||
| FN-U-415 L | Provide resources to condition frozen sample containers on the lunar surface | ||
| FN-U-416 L | Provide resources to condition cryogenic sample containers on the lunar surface | ||
| FN-U-501 L | Provide capability to access residual propellant from surface assets | ||
| FN-U-502 L | Transfer propellant between assets on the lunar surface | #1107 (UC-U-728 L) | |
| FN-U-503 L | Provide storage of cryogenic propellant on the lunar surface | #1106 (UC-U-504 L) | |
| FN-U-504 L | Provide storage of cryogenic propellant in space | #1106 (UC-U-503 L) | |
| FN-U-505 L | Provide storage of non-cryogenic propellant in space | ||
| FN-U-506 L | Provide storage of non-cryogenic propellant on the lunar surface | ||
| FN-U-507 L | Conduct fluid and propellant transfer utilization payload and/or equipment operations on the lunar surface | #0503, #1107 (both UC-U-501 L) | |
| FN-U-508 L | Transfer propellant/fluids between assets in space | #0503, #1107 (both UC-U-502 L) | |
| FN-U-509 L | Provide propellant management system(s) in partial gravity environment | ||
| FN-U-510 L | Provide propellant management system(s) in microgravity environment | ||
| FN-U-601 L | Conduct bioregenerative ECLSS utilization payload and/or equipment operations in space | #0303 (UC-U-723 L) | |
| FN-U-602 L | Conduct plant growth utilization payload and/or equipment operations in space | #0305 (UC-U-725 L) |
Two things to note in this group, both as printed (PDF checked):
- Different wording for the same kind of function. FN-U-301 L and FN-U-302 L say "subsurface samples". FN-U-305 L and FN-U-306 L say "deep subsurface samples, including drill cores".
- Capital letters. FN-U-402 L to FN-U-407 L capitalize "Lunar Surface"; the rest of the list doesn't.
Compared with the Users Guide's Phase 1 list¶
The Moon Base Users Guide (April 2026) prints 31 function IDs with titles as its Phase 1 functional gaps (Users Guide, pp. 8–10, PDF checked on p. 10). Each was compared with the ADD's list above (ADD Rev C, Dec 2025, pp. 117–127, PDF checked).
19 match word for word, apart from the guide's closing full stops.
One ID carries another function's title. The guide prints "FN-P 102 L" with the title "Store energy in the south pole region on the lunar surface." (Users Guide, p. 10). In the ADD:
- FN-P-102 L is "Generate power at multiple distributed locations outside of the south pole region on the lunar surface".
- "Store energy in the south pole region on the lunar surface" is FN-P-202 L (ADD p. 121).
The two sources disagree. The wiki doesn't decide whether the guide means FN-P-102 L or FN-P-202 L. The Phase 1 page keeps the guide's entry as printed, and this page flags both rows (open question 40).
Three differ in wording:
- FN-A-201 L. The guide ends "on the lunar surface from Earth."; the ADD ends "from Earth and/or cislunar space".
- FN-H-102 L and FN-X-103 L. The guide has "moderate duration (month+)" and "moderate durations (month+)". The ADD has "mid-duration (month+)" and "mid-durations (month+)".
Eight differ only in typography or are cut short:
- FN-C-105 L: "high-availability" for "high availability"
- FN-H-201 L and FN-L-301 L: an extra s before "(s)" ("systems(s)", "assets(s)")
- FN-P-301 L: ends "on the lunar." without "surface"
- FN-P-401 L: "payloads/equipment" for "payloads(s) and/or equipment"
- FN-P-402 L: "payload(s)" for the ADD's "payloads(s)"
- FN-T-201 L and FN-T-202 L: "South Pole" capitalized
The guide also prints several IDs without the standard spaces and hyphens ("FN-P 101 L", "FN-P-301L", "FN-A-201L"). The wiki normalizes them, as the Users Guide source page explains.
In the 2024 lunar table¶
NASA's 2024 Lunar Objective Mapping Tables list 206 lunar functions, all of them with the same IDs as here (the wiki's comparison; 2024 lunar table).
- Two are new in 2025: FN-G-106 L and FN-G-107 L, ground services and launch "to support large nuclear assets".
- Fifteen titles changed beyond spelling:
- the duration words, "moderate" to "mid" and "extended" to "long" (FN-H-102 L, FN-H-104 L, FN-H-105 L, FN-X-103 L, FN-X-104 L, FN-P-402 L)
- "large exploration asset(s)" to "large asset(s)" (FN-T-206 L, FN-M-403 L)
- "Relocation of" to "Relocate" (FN-M-601 L, which also changes "lunar surface polar locations" to "the south pole region")
- "polar region" to "south pole region" (FN-I-101 L)
- "regolith-based" added to FN-I-207 L
- small edits to FN-L-101 L, FN-M-103 L, FN-M-602 L and FN-A-402 L
- "maintaing" in eight stowage titles of the 2025 sheet is not in the 2024 table, which prints "maintaining".
- The 2024 allocation of these functions to assets is compared with 2025 on Lunar function allocation.
Related pages¶
Use cases and functions · Lunar use cases · Mars functions · Objective decomposition · Moon Base Phase 1 functional gaps · Sub-architectures · Gaps index · Elements
Sources¶
ADD Rev C, pp. 4, 17, 40, 117–127 (PDF checked),
158 · Tech gaps spreadsheet,
"Architecture Traceability: Use Cases & Functions" column ·
Users Guide, pp. 8–10 ·
2025 Architecture Update, p. 7 ·
Lunar objective decomposition spreadsheet,
"FE+ Functions", "FE+ Functions to Use Cases" and key sheet ·
2024 lunar table, functions.csv