{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp05_complete_proposal_portfolio20_20260803","cell_id":"negative_space_design__marine_science","arm":"COMPLETE_PROPOSAL_PORTFOLIO","candidate_id":"nsd-ms-protected-benthic-reference-voids","proposal_index":2,"version":0,"title":"Protected Reference Voids in Repeated Benthic Survey Grids","problem":"Repeated benthic surveys can crowd a study site with cores, grabs, landers, vehicle tracks, low-altitude thruster passes, and other contact operations. When nominal reference plots are subsequently sampled or exposed to nearby sediment disturbance, observations from them no longer provide a clearly undisturbed local comparison. The problem is not insufficient sampling effort; it is the absence of deliberately unoccupied seafloor within an intensively observed field.","actors":["Benthic-study principal investigator","Cruise chief scientist","Vessel master","ROV or AUV operations lead","Coring, grab, or lander operators","Benthic ecologists and geochemists","Survey data manager"],"observable_state":"Georeferenced operation logs show sampling footprints, vehicle contacts, or sediment-plume paths entering nominal reference plots or their immediate surroundings; repeated imagery shows sampling scars or displaced sediment; unsampled cells are not consistently distinguished from missed stations, navigation failures, or protected controls; analysts lack a nearby plot whose history excludes contact sampling.","consequence":"Changes in fauna, sediment structure, porewater chemistry, or other benthic observations cannot be cleanly separated from disturbance introduced by the research operations themselves, weakening the reference against which sampled plots and temporal change are interpreted.","affected_objective":"Maintain a locally comparable, interpretable reference for repeated benthic observations while still collecting the contact samples required by the approved study design.","intervention":"Before contact operations begin, design the sampling grid around one or more digitally geofenced reference voids rather than filling every eligible cell. Each void contains an untouched reference plot plus a buffer sized from the operation's anticipated footprint, navigation uncertainty, and sediment-disturbance pathway. Within the boundary, prohibit coring, grabs, trawls, lander placement, anchoring, bottom contact, and low-altitude thruster passes. Preserve non-contact observations only when their operating envelope does not compromise the void. Navigation displays and station lists label the empty cells as protected by design, not incomplete work. Sampling stations displaced by the void are logged as deferred or relocated, never silently deleted. Entry requires a predefined scientific-access condition and explicit approval; accidental incursions terminate the plot's reference status rather than being concealed.","structural_mapping":[{"archetype_element":"Attention Competition Map","domain_realization":"A spatial operations map overlays intended sampling footprints, vehicle paths, navigation uncertainty, plume pathways, and the local reference habitat to identify activities that compete with an undisturbed comparison."},{"archetype_element":"Omission Candidate","domain_realization":"Contact stations and low-altitude passes that would occupy the proposed reference plot or buffer are candidates for relocation or documented deferral."},{"archetype_element":"Protected Empty Space","domain_realization":"A geofenced patch remains deliberately free of contact sampling so its lack of occupation can support interpretation of the surrounding sampled field."},{"archetype_element":"Positive Form Relationship","domain_realization":"The untouched patch is paired with nearby sampled plots of the same study stratum, making the spatial absence meaningful as a local reference rather than leftover seafloor."},{"archetype_element":"Absence Boundary","domain_realization":"Mapped coordinates, a navigation-error allowance, operating restrictions, and vehicle-display warnings define the protected plot and its buffer."},{"archetype_element":"Margin and Gutter","domain_realization":"A repeated buffer rule separates protected reference plots from coring footprints, lander placements, vehicle contacts, and anticipated disturbance paths."},{"archetype_element":"Meaning-of-Absence Check","domain_realization":"Station metadata distinguishes protected-by-design cells from missed samples, inaccessible terrain, equipment failure, and unplanned gaps."},{"archetype_element":"Reintroduction Trigger","domain_realization":"Contact activity may enter a void only under a predefined terminal-sampling condition, an approved emergency action, or formal retirement of the reference plot."},{"archetype_element":"Accessibility and Recoverability Guardrail","domain_realization":"Operators can see boundaries and restrictions in ordinary navigation products; displaced stations remain auditable and may be relocated outside the buffer."},{"archetype_element":"Clarity or Effect Test","domain_realization":"Incursion records, imagery, and blinded analysis test whether the protected plot supplies a more interpretable local reference than nominal controls exposed to ordinary operations."}],"mechanism_mapping":[{"mechanism_slug":"architectural_void","role":"Treats the unoccupied reference patch as a designed spatial element whose dimensions and edges are determined jointly with the surrounding sampling footprints.","counterfactual_removal":"Without a designed void, the unsampled area would be incidental and vulnerable to later infill, with no stable relationship to the sampled plots."},{"mechanism_slug":"margin_and_gutter_system","role":"Codifies buffers around every protected plot so separation survives different vehicles, operators, visits, and station-plan revisions.","counterfactual_removal":"Without reusable buffer rules, protection would depend on ad hoc judgment and inconsistent spacing, allowing contact footprints or navigation error to consume the reference area."},{"mechanism_slug":"empty_state_design","role":"Labels each empty grid cell by cause and status, particularly distinguishing protected absence from failed or unfinished sampling.","counterfactual_removal":"Without explicit state semantics, later teams could interpret the blank cells as omissions to complete and inadvertently sample them."},{"mechanism_slug":"sparse_layout","role":"Thins contact operations within a selected part of the grid so the remaining untouched patch can serve the study's priority need for an interpretable reference.","counterfactual_removal":"Without selective thinning, maximizing visible station coverage would continue to crowd out the local undisturbed comparison."},{"mechanism_slug":"editorial_cut","role":"Makes removal of planned stations conditional on preserving study context and recording a recoverable relocation or deferral path.","counterfactual_removal":"Without documented, recoverable cuts, creating the void could erase load-bearing samples or obscure how the executed design departed from the original plan."}],"causal_chain":["Repeated contact sampling and close vehicle operations occupy or disturb nominal reference seafloor.","The study design maps which planned operations compete with the need for a locally undisturbed comparison.","Selected contact stations are relocated or deferred, and a reference plot plus buffer is reserved as protected spatial absence.","Geofencing, navigation cues, and metadata prevent routine operations and later schedule changes from silently filling that absence.","Incursions and permitted observations are recorded, allowing analysts to determine whether the void retained reference status.","The protected plot supplies a nearby observation history without the prohibited research disturbances.","Comparisons between the void and surrounding sampled plots can therefore address whether observed change coincides with natural conditions or with the study's contact operations."],"baseline":"Populate the eligible survey grid with as many planned stations as the study requires, designate controls from nominally comparable cells, and manage avoidance informally during operations. Gaps are treated as incomplete coverage, while later analysts reconstruct research disturbance from vehicle and sampling logs.","nearest_rivals":["Use a distant external control site that receives no study operations; it avoids local disturbance but may differ in habitat, exposure, or temporal conditions from the sampled field.","Model research disturbance after collection using distance to tracks, cores, or landers as covariates; this retains sampling density but depends on measured footprints and modeling assumptions rather than an intentionally unoccupied local reference.","Rotate sampling stations between visits; this spreads disturbance but does not guarantee that any plot remains untouched across the study period.","Take sacrificial reference cores before other operations begin; this captures an initial condition but consumes the reference location and does not preserve an undisturbed repeated-observation plot.","Rely on operator discretion to avoid nominal controls; this is flexible but provides neither a durable boundary nor a shared interpretation of unsampled cells."],"remaining_contrastive_claim":"The proposal tests whether a bounded, explicitly labeled absence of contact operations within the survey field provides an interpretable local reference that denser sampling, post-hoc disturbance adjustment, or a geographically separate control cannot supply in the same way.","authority_safety":{"decision_authority":"The principal investigator and cruise chief scientist may establish or retire scientific reference voids within the approved study and permit conditions. The vessel master retains authority over vessel safety, navigation, emergency response, and legally required actions. The vehicle operations lead may halt an approach that risks an incursion.","authorized_first_step":"In one repeated-survey block, designate one matched candidate plot as a protected reference void, load its boundary and buffer into vehicle navigation displays, label its station records, and audit compliance through one operational visit before considering broader adoption.","excluded_actions":["Restricting navigation or emergency maneuvers required by the vessel master","Contravening permits, protected-area rules, or required environmental monitoring","Representing an accidentally entered plot as undisturbed","Using the void to conceal omitted required samples or unfavorable observations","Allowing anchoring, bottom contact, sample collection, or prohibited thruster approaches inside the boundary","Expanding protection to additional study area before reviewing active-sampling coverage and trial compliance"],"halt_rollback":"If navigation uncertainty, an emergency, an accidental incursion, or an unanticipated plume pathway makes protection unreliable, halt nearby discretionary operations and flag the plot as compromised. Preserve all logs, remove its reference designation for affected analyses, restore the approved baseline station plan where feasible, and select no replacement without a new documented eligibility review."},"negative_tests":{"strongest_counterevidence":"A protected plot remains operationally unentered but is no more interpretable than ordinary nominal controls because natural small-scale heterogeneity, mobile fauna, hydrodynamic transport, or vessel-wide disturbance dominates the local comparison.","problem_falsifier":"The problem is falsified at the tested site if existing controls have documented histories free of contact operations and relevant disturbance exposure, yet reference interpretation remains limited by unrelated measurement error or habitat mismatch.","intervention_falsifier":"The intervention is falsified if the boundary and buffer fail to preserve a verifiably unexposed plot, if blinded analysts gain no clearer attribution from including it, or if relocating the omitted stations removes measurements required for the study's primary objective.","risks":["Reduced or spatially unbalanced contact-sample coverage","Buffers too small for navigation error or transported sediment disturbance","Buffers so large that they exclude load-bearing stations","Natural heterogeneity making the protected plot a poor comparator","Vehicle or station-plan software failing to display the geofence","Later crews treating protected cells as unfinished work","False confidence that absence of direct contact means absence of all research influence","Reference loss after an incursion leaves insufficient time to establish another eligible plot"]},"next_evidence_step":"For one candidate site, preregister the void boundary, buffer rationale, prohibited operations, permitted non-contact observations, comparison plots, incursion rule, and minimum active-sampling requirements. Load the geofence into operational displays and conduct one bounded repeat visit. Use synchronized navigation, altitude, thruster-state, sampling, and imagery records to audit exposure. Then provide analysts with coded observations from the protected plot and ordinary nominal controls, asking them to assess reference status and attribute changes without knowing plot type. Review interpretability, boundary compliance, relocated-station consequences, and any compromised assumptions before authorizing another use.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Proposal 1 addressed temporal acoustic crowding aboard an active-acoustic survey and created short controller-enforced no-transmission intervals so passive signals could be heard. This proposal addresses spatial contamination of benthic reference conditions by physical research operations and creates persistent geofenced seafloor patches with contact-free buffers. Its actors include benthic samplers and vehicle operators rather than acoustic transmitters and hydrophone analysts; its protected absence is an unoccupied place rather than a quiet time; its causal path is prevention of observer-induced substrate disturbance rather than removal of acoustic masking; and it can be adopted independently in a benthic field program that conducts no concurrent passive-acoustic work.","revision_record":{"parent_version":null,"progress_targets_addressed":["Generate one independently adoptable continuation candidate","Address a materially different marine-science problem from proposal 1","Preserve negative space as an active, bounded, interpretable intervention","Specify operational authority, safeguards, rivals, falsifiers, and bounded evidence"],"conceptual_changes":[],"operational_changes":[],"evidence_changes":[],"claim_changes":[]}}