```html Seastead MVP Design Specification

Seastead MVP: "Core-1" Platform

A container-optimized, off-grid micro-seastead engineered for rapid development, low-cost manufacturing, and reliable deployment. Scales directly toward the full 70ft triangular vision.

Container-Optimized Packaging

Every major component is designed to disassemble or nest into a single 40' High-Cube container (interior: ~39.3' × 7.7' × 8.8'). This enables low-cost manufacturing, global shipping, and on-site assembly in target markets like the Caribbean.

  • Frame Beams Max Length ≤11.5 ft
  • Float Sections Modular halves
  • Living Pod Single crate or flat-pack panels
  • Tools Required Basic & torque wrenches
  • On-Water Build Time 2–3 days (2 engineers)

Structural & Float Architecture

Scaled-down triangular truss maintains the original SWAP (Small Waterplane Area) stability principle while fitting shipping constraints.

  • Top Frame Base 24 ft
  • Top Frame Sides 28 ft each
  • Frame Height 7 ft (floor to ceiling)
  • Floats ×3 NACA 0030, 12ft L, 6ft chord, 2ft max width
  • Submersion ~50% nominal
  • Attachment Top 30% flush inside frame, bolted shear plates

Interior & Habitability

Fully enclosed, insulated living volume optimized for two occupants with core off-grid utilities and stable workspace.

  • Enclosure Aluminum/FRP sandwich, large impact glass
  • Sleeping Convertible bunk + forward privacy curtain
  • Workspace Dinghy-style desk, stable at Sea State 3+
  • Storage Under-berth, overhead lockers, galley cabinets
  • Ventilation Passive roof vents + 12V marine fan

Power & Water Independence

Self-sufficient microgrid sized for continuous habitation with marine-grade components and smart load management.

  • Solar Array 2.5 kW flexible/rigid roof panels
  • Battery Bank 12 kWh LiFePO4 (BMS protected)
  • Inverter 3 kW pure sine, 120V/60Hz
  • Watermaker 10 GPD electric RO + pre-filtration
  • Water Storage 8 gal fresh buffer + manual backup
  • Refrigeration 12V marine fridge/freezer combo

Stability & Motion Control (MVP)

Passive hydrodynamic design replaces active stabilizers for Phase 1, reducing complexity, cost, and maintenance.

  • Hull Form SWAP tri-hull, low waterplane area
  • Primary Stability 12° metacentric height at rest
  • Roll Damping Fixed strake fins + submerged foil geometry
  • Pitch Control Center mass optimized, forward buoyancy reserve
  • Desk Stability ≤2° RMS motion in Beaufort 3 (12kt wind, 3ft waves)

Propulsion & Maneuvering (MVP)

Deferred RIM thrusters in favor of reliable, serviceable, and easily sourced marine components for initial operations.

  • Primary Twin 2 kW electric POD drives (bow & stern)
  • Backup Manual tow/anchor & windage management
  • Control Joystick pilot, IP67 marine panel
  • Charging Shore plug + solar regen + optional tow turbine

Development & Scaling Roadmap

Phase 1: MVP "Core-1"

Container-transportable tri-hull, 2-person living pod, off-grid power/water, passive stability, electric POD propulsion. Proves logistics, seaworthiness, and customer readiness.

Phase 2: Expansion

Scaled triangular frame, integrated RIM thrusters, active "airplane" stabilizers, dinghy deployment system, extended back deck, larger solar array.

Phase 3: Full Vision

70ft sides / 35ft back living truss, full glass enclosure, multi-family capacity, autonomous station-keeping, modular utility pods (hydroponics, desalination scaling, workshop).

Key Engineering Notes for Manufacturing

```