SL MarMaster Mariner ยท Quantitative Research

Publications

Studies, articles and a book.

Weather-routing studies computed on ERA5 reanalysis with the per-case numbers published, plus earlier writing on maritime law, tanker operations and local AI. Older articles on general AI and quantitative trading are kept in the archive.

Weather Routing

WindMar v0.2.3: Weather routing on a transatlantic feeder lane (52-week fuel study)

slmar.co • August 9, 2026 • study + PDF

A full year of weather replayed on a Pointe-à-Pitre to Ushant TSS feeder lane: 52 weekly departures on ERA5 winds, waves and GLORYS currents, scored against an honest rhumb baseline. About 2.5% median fuel saved at held speed and 6.0% with just-in-time arrival, of which roughly half is geometry. Every passage and its weather is listed, with the hindsight-ceiling caveat stated.

Weather Routing

WindMar v0.2.3: Routing around Typhoon Dolphin (heavy-weather avoidance case study)

slmar.co • August 5, 2026 • study + PDF

A laden passage southwest of Japan with Typhoon Dolphin across the track. WindMar's isochrone optimiser routes the ship around the storm core at the same engine order: 4.9% less fuel over a longer track, but the point is safety: peak roll cut from 33.9° to 17.0° and significant wave from 7.4 m to 5.8 m, with the seakeeping module flagging the synchronous-roll legs.

Weather Routing

WindMar v0.2.0: Weather routing on a North Atlantic crossing (fuel-gain study)

slmar.co • June 14, 2026 • study + PDF

A factorial fuel-gain study on a Gibraltar-New York crossing for an MR tanker, plus a worked seasonal expectation: least-fuel routing over coupled wind, sea-state and current fields. The gain is about 2% of voyage fuel at the physics ceiling, concentrated in heavy weather; the great circle remains a strong baseline.

Weather Routing

What Weather Routing Actually Buys

slmar.co • May 25, 2026 • study + PDF + interactive report

A geometry / seasonal-β / forecast-α decomposition of optimizer fuel-ROI across ocean regimes, under ERA5+GLORYS replay against a pre-registered protocol. The forecast-dependent component a real-time service adds is under 1% of fuel: and that is a hindcast upper bound.

Local AI

OpenAI on your desk: Why Moving to Local Models

AI Advances • Aug 8, 2025 • 7 min read

How to Shift Projects in a Rapidly Evolving Environment - exploring the benefits and practical considerations of running large language models locally.

Archive: general AI and quantitative trading, 2023 to 2024 (32 articles)
Quantitative Trading

Trading Small Caps

InsiderFinance Wire • Dec 16, 2024

The difficult exercise of balancing risk and reward.

Quantitative Trading

Is JSON All You Need?

AI Advances • Oct 27, 2024

Building an AI trading assistant with MyShell.