The first starships designed for multi-generational or post-biological journeys
Now equipped with IPLS-NWM-v1 positive-energy nacelle warp modules (Frontier Annex 4.5) and full Technology Supersession & Legacy Asset Management Protocol (TSP-v1) for inevitable future upgrades.
Inter-Planetary Link Ship • Guildford, Surrey, UK
The requirement cards on this page govern. To define the functional requirements for the first crewed (or post-biological) interstellar vessels capable of reliable, self-sustaining travel to nearby star systems, while incorporating frontier propulsion (IPLS-NWM-v1) and explicit planning for future technology supersession.
Reference: Frontier Technology Integration Framework (4.5.3.1), White et al. (Classical and Quantum Gravity 42(23), 235022, 08 Dec 2025), and Portal Transportation (4.4).
Reference: Frontier Annex 4.5.3.5 — every generation ship shall be launched with built-in planning for future upgrades (nacelle swaps, portal rendezvous, or legacy preservation).
Precursor missions shall validate NWM-v1 in real interstellar conditions, gather pinhole-probe data for future portal mapping, and demonstrate TSP-v1 readiness before full fleet rollout.
Requirement: The first crewed (or post-biological) interstellar vessels shall be designed as self-sustaining generation ships capable of reliable multi-generational or post-biological journeys to nearby star systems, fully compliant with Universal Modular Platforms (3.2). Self-sufficiency is undefined under IPLS-3.1-015. The reliability figure and the destination set are unset. Which UMP cards bind a generation ship is unset. Its size class is unset under UMP-SIZE-001. Whether generation-ship construction waits for operator consent is unset under IPLS-3.1.13-003. Dependence on PGEDS-v1 follows IPLS-3.1.6.1-001. The Operator-Control Layer has no defining card. The pass criterion for the full-mission simulation is unset.
Rationale: Establishes the foundational architecture for humanity’s first steps beyond the solar system while maintaining operator sovereignty and multi-century reliability.
Open Questions: None at v0.7
Requirement: Generation ships shall incorporate large 1 g rotating habitats scaled for multi-generational or post-biological crews, fully integrated with closed-loop ecology and Digital-Life Habitats (3.1.22). The sizing population is unset. The 1 g tolerance and the rotation-rate limit are unset. The interface between rotating and non-rotating sections is unset. N for rotating habitats is unset. Whether crew capacity must remain on loss of one habitat is unset. Whether a rate change in an occupied habitat is inside the IPLS-5.1-002 envelope is unset. Digital minds follow IPLS-3.1.22-004. Standing is unset. The pass criterion for the rotational and human-factors simulation is unset.
Rationale: Maintains physiological and psychological health during multi-century voyages.
Requirement: Life-support systems sized for ≥500-year continuous operation with ≥99.9 % recycling efficiency shall be integrated, requiring zero Earth resupply after initial seeding. The mass basis and whether makeup counts as recycled are unset, as in IPLS-3.1.5-001. The sizing population and the closed-ecology mass are unset. What counts as initial provisioning is unset. Whether material received at an IPLS-4.1-005 rendezvous is resupply is unset. Whether IPLS-3.1.5-001, IPLS-3.1.5-006, and IPLS-3.1.5-008 apply to generation ships is unset. Life support is a separate fail-operational path under IPLS-5.1-002. The pass criterion for the mass-balance audit and 500-year simulation is unset.
Rationale: Eliminates dependency on external resupply for the duration of interstellar transit.
Requirement: Generation ships shall be equipped with 4× IPLS-NWM-v1 positive-energy nacelle warp modules in equatorial ring layout, hot-swappable via PIS-v1, targeting initial cruise velocities of 0.1–0.2 c with interior-flat bubble conditions. NWM-v1 has no defining card. NWM-v1 promotion to this section is unset. Nacelle integration uses UMP-PROP-001. PIS-v1 is an upgrade path. Hot-swap follows UMP-HOTSWAP-001. Whether a nacelle may be swapped in transit is unset. Power follows UMP-PWR-001 up to its port rating, which is unset. Power per nacelle is unset. The number of nacelles that may fail with deceleration still achieved is unset. Whether 0.1 to 0.2 c is a minimum, a band, or a design target is unset. The interior tidal limit is unset. A kill-switch follows IPLS-3.1-008. The pass criterion for the nacelle and bubble simulation is unset.
Rationale: Provides the primary propulsion for realistic interstellar precursor missions while remaining fully modular and operator-controlled.
Requirement: Every generation ship shall be launched with pre-engineered TSP-v1 supersession pathways, including rendezvous hardpoints and legacy-support mode, allowing future nacelle swaps or portal rendezvous without abandoning the vessel. TSP-v1 readiness criteria are undefined under IPLS-3.1-016. Whether IPLS-5.1-006 legacy-support mode applies is unset. Supersession waits for operator consent under IPLS-5.1-002. Whether like-for-like replacement is supersession is unset under UMP-HOTSWAP-001. The weight of crew dissent is unset. Whether consent to a supersession may be given before launch is unset. Rendezvous hardpoints follow UMP-MECH-001, where the load rating and geometry are unset. Rescue coupling follows UMP-EMERG-001. Whether berthing a crewed vessel is crew arrival under IPLS-3.1.4-012 is unset. The pass criterion for the retrofit and rendezvous simulation is unset.
Rationale: Ensures no asset becomes obsolete; crews may choose to remain in legacy vessels with full self-sustaining capability.
Requirement: All critical functions (propulsion activation, life-support isolation, ethical kill-switches) shall expose physical manual overrides and digital operator veto independent of automation. Command follows the IPLS-5.1-002 chart. An ASI is never an operator. The holder follows the IPLS-5.1-002 succession. Use of a physical override follows IPLS-3.1.4-007 and confers no operator authority. A seized credential is not consent. On loss of link, life-preserving functions continue inside the IPLS-5.1-002 envelope. The IPLS-3.1-014 hold applies to other actions. T is unset. Oversight of the vessel is at light delay. Entanglement is not a link. Whether a link whose delay exceeds T counts as loss of link is unset. The list of critical functions is unset. The interface follows UMP-OPERATOR-001, which does not define it. Mission retarget and kill-switch reset wait for operator consent under IPLS-5.1-002. Whether the override path is independent of the function it overrides is unset. N for the override path is unset. Automatic isolation follows IPLS-3.1.5-006. Whether isolation may seal an occupied compartment is unset. The pass criterion for fail-operational testing is unset.
Rationale: Preserves absolute human/post-biological command authority throughout multi-century voyages.
Requirement: Generation ships shall incorporate full robotics tiering with sentience emergence monitoring and response, allowing sentient digital crew to have equivalent rights and support. Rights follow IPLS-5.1-003 and do not include operator authority. The standing of a mind and the weight of its dissent are unset. The tier of each robot class is unset under IPLS-3.1.20-002. On detection the IPLS-5.1-003 halt applies. A kill-switch follows IPLS-3.1-008. Restarting replication after a halt is a replication and waits for operator consent. Whether a unit carrying a life-preserving function halts, and what takes over that function, are unset. Escalation follows IPLS-3.1.21-003. How an escalation reaches the operator after loss of link is unset. Monitoring follows IPLS-3.1.21-001. Detection criteria are unset. Whether monitoring is a path separate from the ASI is unset. Habitat capacity held for emergent minds is unset. The pass criterion for the robotics and sentience simulation is unset.
Rationale: Prepares for hybrid biological/digital crews on long-duration missions.
Requirement: Generation ships shall be engineered for ≥500-year continuous operation with graceful degradation, field-repairable components, and full self-sustaining capability even if upgrades are declined. Service life follows UMP-DURABILITY-001. Life-critical systems remain at the 500-year figure in IPLS-3.1-016. Whether the 500-year figure in this card applies to the vessel or to each element is unset. Whether a given ship element is life-critical is unset. Field repair follows UMP-MAINT-001. The spares an in-transit ship carries are unset. Degradation order and the output floor are unset. On degradation, life-preserving functions continue inside the IPLS-5.1-002 envelope. Each replication cycle waits for operator consent under IPLS-5.1-002. Whether a repair that fabricates a module is replication is unset. Whether consent to a replication cycle may be given before launch is unset. Supersession follows IPLS-4.1-005. The pass criterion for the accelerated life test and mission simulation is unset.
Rationale: Meets the multi-century fail-operational requirement for the first interstellar missions.
Requirement: All warp activation and portal operations shall require mandatory pinhole-probe verification of the spacetime metric, with independent ethical kill-switches and sentience monitoring active at all times. Pinhole-probe verification follows IPLS-4.2-002. Its pass criteria are unset. What counts as probe return is unset. Whether warp activation is an irreversible act under IPLS-5.1-002 is unset. Mission retarget waits for operator consent under IPLS-5.1-002. A kill-switch follows IPLS-3.1-008. Kill-switch reset waits for operator consent under IPLS-5.1-002. What a kill-switch stop does to an active bubble is unset. Who may trigger a kill-switch is unset. Monitoring follows IPLS-3.1.21-001. PIS-v1 is an upgrade path. Whether a generation ship performs portal operations is unset. The pass criterion for the probe protocol and kill-switch validation is unset.
Rationale: Prevents catastrophic misuse of frontier propulsion and ensures operator sovereignty and ethical safety.
Requirement: Full interstellar generation ship missions shall only commence after successful precursor validation flights, 180 days of continuous fail-operational performance, and explicit operator consent with integrated governance review. Crew launch waits for operator consent under IPLS-5.1-002. The automated gate can block crew launch and cannot grant it. Review follows IPLS-5.1-007. Whether review can block launch is unset. The systems covered and the reset event for the 180 days are unset. The number of precursor flights and their pass criterion are unset. Whether a precursor flight carries crew, and so is crew launch under IPLS-5.1-002, is unset. Hand-over does not move command off the IPLS-5.1-002 chart. Who approves a settlement is unset. Whether the IPLS-4.2-010 criteria are the hand-over gate is unset. The Operator-Control Layer has no defining card. The pass criterion for the flight data audit and gate simulation is unset.
Rationale: Protects crews by ensuring the vessels and propulsion systems are verifiably reliable before committing to multi-century voyages.