Vessel GPU Racks: Power, Cooling, Security
The unglamorous realities of deploying GPU compute on a vessel. Power budgets, thermal management, vibration isolation, and physical access control.
James Calder·May 17, 2026

Chief Technology Officer, ShipboardAI
James Calder spent a decade flying helicopters off the decks of warships before transitioning into defense AI and simulation engineering. He holds a Master's in Human Systems Integration and has led the design, deployment, and testing of AI systems for some of the most demanding operational environments on Earth.
At ShipboardAI, he oversees the technical architecture of every deployment, from GPU cluster design to model optimization for bandwidth-constrained maritime networks. He writes about what he knows: making AI work where the cloud cannot reach.
His operational background (500+ hours of night-vision flight, combat deployments, and operational test pilot experience)shapes how he thinks about edge computing. When the link drops at 2am in heavy weather, abstract best-practices stop mattering. Only what is physically on the vessel still works.
The unglamorous realities of deploying GPU compute on a vessel. Power budgets, thermal management, vibration isolation, and physical access control.
James Calder·May 17, 2026
MSC Cruises is putting AI robot dogs and digital avatars on its ships. Every one of those systems proves why compute has to live on the vessel.
James Calder·May 8, 2026
The IMO's autonomous vessel code requires ships to operate safely without shore connections. That is a regulatory endorsement of AI that lives on board.
James Calder·May 6, 2026
The US military is escorting stranded vessels through the Strait of Hormuz. Cloud-dependent AI stops working the moment a ship joins the convoy.
James Calder·May 4, 2026
Royal Caribbean told Wall Street that AI drives its $4.5 billion revenue engine. The question nobody asked: what happens when the satellite link drops?
James Calder·May 1, 2026
A working comparison of Starlink Maritime, Eutelsat OneWeb, and Iridium Certus for vessel AI workloads. What each is good for, and what breaks at sea.
James Calder·April 26, 2026
ChatGPT went down for 90 minutes on April 20. For desk workers, that is an inconvenience. For a vessel at sea, it is an architecture problem.
James Calder·April 22, 2026
A Starlink outage grounded Pentagon drone tests this week. The same single-provider risk threatens every vessel running cloud AI.
James Calder·April 17, 2026
Next Yacht Group is shipping on-vessel AI as a standard feature across its entire range. Here is why that changes the conversation for every yacht owner.
James Calder·April 15, 2026
Virgin Voyages grew to 1,500 cloud AI agents in four months. The results are real. So is the connectivity risk nobody is discussing.
James Calder·April 13, 2026
Blackwell B200, H200, H100, L40S, and A100 compared for vessel deployments. When each is the right call and the power realities.
James Calder·April 11, 2026
AMD Strix Halo and NVIDIA DGX Spark bring 128 GB of unified memory to a shelf-sized box for under $4,000. When to buy one.
James Calder·April 10, 2026
Starlink promised 200 Mbps. You are getting 11. What satellite connectivity actually looks like on a vessel and how to plan for it.
James Calder·April 9, 2026
SpaceX is talking gigabit speeds for Starlink in 2026. Here is why throughput is the wrong thing to focus on for vessel AI.
James Calder·April 9, 2026
VRAM and KV cache math for models from 7B to 405B at 1M tokens. Per-user scaling for crew and guests. The numbers are ugly.
James Calder·April 7, 2026
Cloud chatbots fail when the ship leaves port. Here is what an on-vessel AI concierge looks like, and why guests will not notice.
James Calder·April 1, 2026
On-vessel AI handles crew scheduling, certifications, and compliance for 2,000+ crew without relying on a satellite link.
James Calder·March 25, 2026
Cloud-based predictive maintenance breaks down at sea. Here is why catching engine trouble mid-ocean is a harder AI problem than it looks from shore.
James Calder·March 18, 2026
Man overboard detection and deck safety monitoring are latency-sensitive problems. Here is why shore-side processing cannot meet the operational bar.
James Calder·March 11, 2026
Your satellite link cannot support cloud-based AI on a vessel. Here is why, and what actually works 200 miles from shore.
James Calder·March 4, 2026