[#29] Contingent one-off cost for a planned extraction/retrieval operation (heavy-lift, custom retrieval tooling, extended specialist deployment); very large variance depending on chosen method.

[#4, #5, #6, #11, #12, #13, #20] Purchase and R&D for micro-ROVs and custom housings, procurement of a work-class ROV system and TMS, long-length tether reels and winches, generator and power hardware, initial continuous monitoring sensor arrays (cameras/hydrophones/tension sensors), secure communications hardware, and initial spare-parts inventory.

[#8] Optional controlled borehole / directional drilling to 750+ m depth (rig mobilization, drilling, casing, geology surveys, contingency). High variance depending on geology and approach.

[#17, #18] Initial engineering studies, modeling and small-scale testing; BSL-capable sample handling / pathology lab fit-out and initial scientific instrumentation for analysis.

[#2, #7, #9, #10] Perimeter setup, motor clamp engineering/installation, civil works (roads/helipad/staging), and initial field camp/operations shelter setup. Includes fencing/anti-tamper, structural installation of clamp/motor works and basic camp construction.

[#24] One-time contingency reserve for blackout/incident response, local remediation, or controlled payouts in the event of leaks/exposure.

[#26] Initial internal contingency/reserve to cover catastrophic incidents or unforeseen replacements.

[#1] Legal control/lease/expropriation negotiations, permits, legal counsel, and one-time payments or covert payments to local authorities/landowners.

[#21] Initial mobilization, international transport of heavy equipment, customs handling, and airfreight/crating costs to establish site operations.

[#16] One-time purchase of onsite medical equipment, emergency kits, and initial specialized training related to remote-site medevac/emergency response.

[#23] Initial legal counsel, cover-story setup costs, local liaison onboarding, and diplomatic risk mitigation startup costs.

[#3, #14, #15] 24/7 security rotations and guards, scientific staff (physiologists, marine engineers, geologists, anomalous researchers), and technical staff (ROV pilots, mechanics, electricians, IT).

[#17, #18, #25, #27, #28] Ongoing engineering modeling and updates, lab operations and pathology work, environmental monitoring of groundwater, archival/reporting/oversight administrative costs, and a modest multi-discipline long-term research program.

[#2, #9, #10, #11] Perimeter and site maintenance, camp utilities and upkeep, helipad/road maintenance, and generator maintenance / fuel logistics (ongoing).

[#30] Annualized lifecycle and major refresh fund (budgeting for 20–50% of initial capital per decade, expressed as ~2–5%/yr of initial capital).

[#4, #5, #6, #20] Annual repairs, pressure-testing, spare parts, and servicing for micro-ROVs, work-class ROVs, tether systems, and winches.

[#26] Annual replenishment/top-up of the internal risk reserve to prepare for escalations and large replacements.

[#12, #13, #19, #20] Data charges and telemetry costs, communications bandwidth, corrosion control consumables and replacements, and routine spare-part/battery replenishment.

[#21] Yearly transport for rotations, international shipping cycles, customs recurring costs, and mobilization for specialist deployments.

[#23] Ongoing legal counsel, local liaison costs, covert cover-story maintenance, and political risk mitigation.

[#16] Medevac contract standby costs, refresher medical training, and replenishment of emergency medical supplies.

[#22] Regular training exercises for staff and guards, safety drills, and ROV operation refresher courses.