NAMCA — North Atlantic Modular Compute Array

50-Pod Compute Matrix Sec 2 & 7

100,000 GPUs ÷ 50 pods = 2,000 GPUs/pod. Click any pod below or in the 3D ocean view to inspect, isolate, or winch to the surface station.

Green: Operational Amber: Warning Red: Fault Blue: Reroute White: Recovery

Infrastructure Layers Sec 14 & 15

Steel Recovery Tethers (Structural Only) Partial-Mesh Fiber Network & Particles Overhead Infrastructure Corridors LOD Simulation Mode (Sec 16: Active Pod Full)

Ocean & Tension Conditions Sec 9 & 10

North Atlantic Sea State (Wave Swell) 2.8 m

Floating Station Heave ±0.9 m

Dynamic Tension Dampening 98.4% Isolated

Pod Operating Depth 1,250 m (Abyssal Cold Sink)

SUBSEA TELEMETRY VIEWPORT // DRAG TO ORBIT • SCROLL TO ZOOM • CLICK POD

“The ocean provides the thermal environment; modularity provides survivability; buoyancy provides recoverability; and the surface station provides maintainability.”

RENDER ENGINE ARCHITECTURE (SEC 16 & 17)

Active Pod: High-Detail Interior Ready | 49 Pods: Instanced World Mesh

White Particles = Active Power/Data Traffic (Sec 15)

POD-01 // COMPUTE DOMAIN OPERATIONAL

Compute Hardware 2,000 / 2,000 B200 GPUs

Pod Utilization / Power 91.4% / 2.84 MW

Primary Coolant / Hull Temp 34.2°C / 4.1°C

Internal Atmosphere 1.0 atm Dry Air (-12°C DP)

Emergency Ballast State Restrained @ 1,250 m

Mesh Network Links 4 Active Redundant Paths

Fault Containment & Sphere Recovery Sec 7, 11, 12

Test the principle: “A local failure remains local.” Unexpected pressure changes lock ballast into a safe state awaiting deliberate surface recovery.

SPHERE RECOVERY SEQUENCE (SEC 11):

State: Subsea Operating Restraint Engaged (1,250 m)

Facility Operations Telemetry Log Sec 22

INSIDE SPHERICAL POD-01 // WATERTIGHT COMPARTMENTS

Metallic pressure-resistant buoyant sphere (Sec 3). Click any interior compartment to inspect or isolate.

Sec 3, 5, 18

COMPARTMENT A: UPPER COMPUTE BAY (RACKS 1–8)

Houses 1,000 NVIDIA B200-class accelerators in sealed modular service cassettes with overhead power/fiber trays and primary liquid cooling manifolds.

Serviceable Internal Hardware — Interlocked Cassette Sec 4

“A technician should not need to rebuild an entire subsea pod because a handful of accelerators failed.” Execute the 5-stage mechanically interlocked extraction sequence below:

INTERLOCK ENGAGED // 8x B200 BLADE CASSETTE #C-04 ONLINE

Internal Atmosphere & Human Access Sec 5

Cabin Atmosphere Composition Dry Human-Breathable (21% O₂ / 78% N₂)

Industrial Dehumidification Active (-12.0°C Dew Point)

Condensation Margin on Cold Pipes +16.2°C Safe Margin (Zero Moisture)

GPU-State Array Simulation Sec 17 & 19

Rather than instantiating 100,000 3D GPU meshes, the simulation stores compact state arrays. Below are the 2,000 accelerators in this pod (100 clusters × 20 B200 GPUs). Click any cluster to toggle faults or maintenance:

Selected Cassette Cluster CASSETTE #C-04 (GPUs 060–079)

Operational State GREEN // OPERATIONAL

Die Temp / Utilization 58.4°C / 96.2% Tensor Load

Power / Network State 28.0 kW / NVLink + Dual-Fabric OK

Emissive Indicator Convention Sec 19

Green Emissive Nominal Compute Operation

Amber Emissive Thermal / Coolant Warning

Red Emissive Hardware Fault / Leak Isolation

Blue Emissive Active Mesh Network Rerouting

White Emissive Cassette Maintenance / Recovery

Thermodynamic Parameters Sec 5 & 6

Adjust the AI workload, deep-ocean ambient temperature, and HVAC dehumidifier power to see why NAMCA designs around dew-point control rather than making the cabin freezing cold.

Pod AI Compute Load (2,000 GPUs) 92% (2.68 MW)

Deep Ocean Seawater Temp 2.4 °C

Primary Coolant Pump Flow Rate 100%

Industrial Dehumidification Power 95% (Dry Air)

Key Thermal Design Rules Sec 6

GPU → Primary Coolant → Heat Exchanger → Seawater → Ocean

Raw seawater never enters the electronics environment. Cold deep-ocean water provides a massive temperature gradient across the liquid-to-liquid heat exchanger.

CLOSED-LOOP PRIMARY COOLANT & SEAWATER HEAT EXCHANGER

Live thermodynamic flow simulation: observe heat rejection from B200 cold plates into the North Atlantic abyssal sink.

CONDENSATION-FREE // SAFE

1. B200 GPU Junction Temp 58.2 °C Direct-to-chip cold plates

2. Primary Coolant Loop 33.8 °C → 14.6 °C Closed dielectric/water loop

3. Seawater Heat Exchanger 2.4 °C → 11.8 °C Isolated titanium manifold

4. Cabin Dew Point vs Cold Pipe -12.4 °C DP (Safe) No moisture on 14.6°C pipes

Dew-Point Psychrometrics Sec 5

Cabin Air Temperature 22.5 °C (Human-Comfortable)

Relative Humidity (RH) 8.5% RH

Calculated Cabin Dew Point -12.4 °C

Coldest Internal Surface 14.6 °C (HX Return Manifold)

Dew-Point Safety Margin +27.0 °C Above Dew Point

Why Not Nitrogen / Sealed Inert Gas?

Unlike Project Natick’s sealed nitrogen atmosphere, NAMCA spheres are designed for rapid human technician servicing at the surface station without lethal asphyxiation hazards or full purge cycles.

By maintaining a ultra-low dew point via continuous HVAC dehumidification, cold seawater-cooled heat exchangers never sweat inside the breathable cabin.

Geographic Site Selection Lab Sec 20 & 21

“The facility should favor extremely boring geology.” Evaluate North Atlantic candidate regions:

1. North Atlantic Intraplate Abyssal Plain 98 / 100 OPTIMAL

Tectonically stable plate interior, 2.4°C bottom water, zero volcanism, adjacent to transoceanic fiber trunks.

2. Mid-Atlantic Ridge Fracture Zone 24 / 100 REJECTED

High seismic hazard, hydrothermal venting, active faulting & volcanic risk violate Section 20 criteria.

3. Steep Continental Slope Canyon 51 / 100 MARGINAL

Close to shore power, but elevated submarine-landslide & turbidity current risk.

Tectonic & Seismic StabilityExtremely Stable (Cratonic/Intraplate)

Submarine Landslide RiskMinimal (<0.5° Seabed Gradient)

Transoceanic Fiber Proximity3 Independent Subsea Trunk Routes

Multi-Decade Hardware Evolution Sec 23

“The physical campus remains while its computational hardware evolves.” Simulate generational cassette upgrades across the 50 pods:

Installed Accelerator ClassGen 1: NVIDIA B200-Class (100k GPUs)

Facility AI Compute Capacity2,000 ExaFLOPS (FP4 Dense)

Spheres / Moorings Rebuilt0% (100% Permanent Hull Reuse)

Historical Distinction: Natick vs. NAMCA Historical Note

Dimension	MS Project Natick (Phase 2)	NAMCA (Cerulean 2026)
Scale	864 servers (1 sealed drum)	100,000 B200 GPUs (50 spheres)
Serviceability	Lights-out 5-yr sealed cycle	Continuous cassette hot-swap
Atmosphere	100% Dry Nitrogen (unbreathable)	Dry breathable air (low dew point)
Recovery	Heavy marine crane ship retrieval	Buoyant pod + steel tether winch

COMPLETE ARCHITECTURAL SPECIFICATION // 24 SECTIONS + HISTORICAL RECORD

Concept Designation: NAMCA (North Atlantic Modular Compute Array) • Author: Cerulean • Record Date: August 31, 2026