
SCNT and PC/UMS — Why Suez and Panama Don't Use Your Ship's Certified Tonnage
SCNT and PC/UMS explained: why Suez bills on 1873 rules, why Panama built its own system, and why the same ship pays on different numbers at each canal.
Expert guides on voyage planning, route optimization, and shipping industry analysis.
Maritime Insights is the analytical layer of Fairway ETA. The calculator and data hub price the next voyage; this section reads the conditions around it — why a freight rate is moving, how a regulatory cycle reshapes routing decisions, where the market and the physical fleet have drifted out of sync.
The work is organized into eight categories — Freight & Chartering, Vessels & Fleet, Trade & Insurance, Fuel & Emissions, Market, Geopolitics, Routes, and Regulation. Category detail, voice notes, and editorial standards are documented at the bottom of this page.

SCNT and PC/UMS explained: why Suez bills on 1873 rules, why Panama built its own system, and why the same ship pays on different numbers at each canal.

MV, MT, MS, LNG/C — every commercial ship prefix explained with real examples from fixture recaps and Bills of Lading. Practical guide for shipping professionals.

A modern ship's hull is standardized worldwide — same steel grades, same welding rules, same safety systems. But the tools and fittings inside the engine room still carry the fingerprints of whichever national industries supplied its engines and components. Why is one layer fully unified and the other one not?

VLCC capacity: 200,000–320,000 DWT, roughly 2 million barrels per voyage. Suezmax: 120,000–200,000 DWT. Aframax: 80,000–120,000 DWT. Each tanker size class is defined by a physical constraint — a canal width, a port draft, a terminal limit. This guide covers every class from MR to ULCC: tonnage, dimensions, cargo capacity, typical routes, and per-barrel economics.

Bulk carrier size names look technical but they're really shorthand for trade patterns. A Capesize means iron ore. A Panamax hints at grain or coal. About 70% of the world's seaborne iron ore moves on Capesize alone — which is why a single commodity can move the entire BDI. A plain guide to the size labels that quietly organize the dry bulk fleet.

Why the Cape became the default Asia–Europe lane, how war-risk insurance flipped the economics, and what voyage planners should optimize beyond distance.
Freight & Chartering covers TCE, Worldscale, FFAs, demurrage, charter parties, and the Baltic indices. Vessels & Fleet covers ship types, fleet structure, shadow fleet, and yard capacity. Trade & Insurance covers bills of lading, P&I clubs, classification societies, and war risk insurance. Fuel & Emissions covers bunker prices, ECA zones, carbon capture, and the energy transition. Market reads freight rates, index divergence, and shipping cycle diagnostics. Geopolitics tracks how chokepoint events become freight costs. Routes covers route economics, distance comparisons, and ETA methodology. Regulation covers IMO frameworks, MEPC outcomes, trade policy, and compliance impacts.
Standards are kept on the about page. The short version: we cross-verify against primary sources before publishing, we paraphrase rather than quote at length, and we date articles so corrections can be tracked. If a number turns out to be wrong, we update the article rather than letting the original stand.