Fleet tactical simulator with realistic physics.
Multi-platform, multi-domain naval combat. Surface combatants, maritime patrol aircraft, and submarines with accurate sensor physics, AI-driven crews, and real geographic contexts. Built for wargaming. Configurable for training.
Who it's for
Two audiences, one engine. The same physics and AI run both the wargame and the training simulator.
Naval professionals and enthusiasts
Realistic naval combat at the operational level. Surface, subsurface, and air platforms with accurate physics. Operational areas based on real geography. Wargame scenarios where stakes plus uncertainty produce replayable engagements.
- Serious naval wargamers
- Military history enthusiasts
- Defense analysts
- Simulation community
- Harpoon / Dangerous Waters alumni
- Armchair admirals
Naval training and education
Same engine, configurable as institutional training simulator. Human operators replace AI crew stations. Tactical decisions in realistic conditions at a fraction of defense contractor training system costs.
- Naval academies
- Professional military education
- Defense training programs
- ROTC programs
- Operational analysis groups
- Defense contractors
What you get
Three warfare domains, five operational areas, and AI crews that operate under realistic rules of engagement.
Multi-Platform, Multi-Domain
Surface combatants (FFG-7 Oliver Hazard Perry-class), maritime patrol aircraft (P-3C Orion), and submarines (Kilo-class SSK). Each platform with realistic sensors, weapons, crew composition, and flight or depth models.
Real Geographic Context
Five operational areas with Natural Earth-derived coastlines and curated naval features. West Philippine Sea, Persian Gulf, North Atlantic, South Atlantic, Western Pacific. 56 named features across straits, ports, and islands.
AI-Driven Autonomous Crews
Each platform operates with a full crew template. TAO, sonar, radar, weapons, communications. Autonomous mode under ROE constraints. Named officers with distinct voices and operational personalities.
Multi-Platform Coordination
Link Data sharing across friendly platforms. Tasking protocols for operational coordination. Over-the-horizon targeting via helicopter data link. Multi-ship patrol scenarios with coordinated defense.
Realistic Physics Throughout
Sonar with thermocline modeling and environmental absorption. Radar with atmospheric ducting. Weapons with real kinematics and range-dependent Pk. Damage modeling per compartment. Sea state and weather affect every sensor.
Structured Wargame Scenarios
35+ scenarios across 7 categories from tutorial to saturation attack. Delayed contact spawning, seed variation, and stochastic adversary plans mean different outcomes each play. YAML-defined and editable.
How it works
Pick a scenario, take command, and see what unfolds. Every play is different.
Select a scenario
Browse the library by category and difficulty. Cold War North Atlantic ASW. Modern Persian Gulf operations. West Philippine Sea patrols. Saturation attacks. Submarine hunts. Or build your own in the visual editor.
Operate or observe
Play as TAO of a frigate, TACCO of a patrol aircraft, or CO of a submarine. Issue natural-language commands to your crew. Or set autonomous mode and watch AI crews execute under ROE constraints.
See what unfolds
Adversary plans are stochastic. Sensors are environmental. Decisions matter. Post-engagement analytics show layered defense effectiveness, magazine pressure, and teaching points. Counterfactual analysis suggests alternate outcomes.
AI capabilities
AI drives the crew, the adversary, and the tactical narration. Every capability has a concrete specification.
Autonomous crew operations under ROE
10 CIC stations per platformAI crews make tactical decisions under realistic rules of engagement. Three ROE levels (Weapons Hold, Weapons Tight, Weapons Free). TAO orchestrates the operational picture. Each station operates within its responsibilities.
Natural-language CIC commands
39 command typesType plain English orders. The LLM translates to structured commands, routes to the correct crew station, and the officer acknowledges in character before executing.
Proactive tactical callouts
Watchlist-drivenTAO registers conditions during command execution. When a track enters the engagement envelope or a contact reaches FIRM quality, the TAO calls it out without being asked.
Crew voice synthesis
11 distinct voicesEach station officer has a distinct Kokoro TTS voice. Sequential playback after command execution. Mute toggle for silent operation. Server-side synthesis, no client-side model.
What's modeled
Specifications drawn from publicly available naval references and simulation industry standards. No arbitrary game-balancing values.
Use cases
One engine, three contexts. The physics and AI don't change — the operator model does.
Training and education
Naval academies, professional military education, defense training programs. Same engine as the wargame, configured with human operators replacing AI crew. Tactical decisions in realistic conditions.
Operational analysis
Test tactical concepts in realistic scenarios. Compare doctrines. Explore force structure questions. Post-engagement analytics with counterfactual what-if analysis.
Naval enthusiast wargaming
For serious naval simulation enthusiasts who want realistic physics with structured gameplay. Multi-platform operations in real geographic contexts. In the tradition of Harpoon and Dangerous Waters.
Pricing
Three editions. Same physics engine. Different operator models and support levels.
Wargame Edition
TBD
Individual license
- All platforms and scenarios
- AI crew with TTS voices
- Scenario editor
- Post-engagement analytics
Training Edition
Custom
Institutional license
- Everything in Wargame
- Human operator stations
- Custom scenario authoring
- LMS integration hooks
Enterprise
Custom
Defense customers
- Everything in Training
- Custom platform models
- Classified scenario support
- On-premise deployment
About Fathom
Fathom is built by Gigabox, an AI-native software factory operating from BGC, Manila. The same engineering team that builds multi-tenant SaaS platforms, autonomous agent runtimes, and self-hosted inference infrastructure built this simulator.
Naval combat involves realistic physics across multiple domains, multi-platform coordination, and AI-driven autonomous decision-making under uncertainty. The architectural patterns developed for Fathom — tick-based simulation, pure-function physics, deterministic replay, structured scenario definitions — apply across the Gigabox product portfolio.
The engine is 33 development phases deep. 1,500+ automated tests verify physics, protocol, crew behavior, and backward compatibility across every commit. Three playable platform types cover all three warfare domains. Five operational areas use real-world geography. The foundation is solid. What comes next depends on who wants to use it.