maritime

The largest ship ever built was a 458-meter supertanker. Compare record-holders by length, tonnage, and cargo capacity, from supertankers to floating LNG plants.

The world's largest yachts are floating cities. The Eclipse, owned by Roman Abramovich, stretches 164 meters and costs an estimated 500 million dollars to build. The Azzam, at 180 meters, was the longest yacht in the world for a decade. The New Global, recently launched in 2024, measures 180 meters and generates nearly 100 megawatts of power. This essay catalogs the 10 largest yachts by length, documenting their engineering, ownership where public, and the technological race to build the most massive privately-owned vessel.

No official global ranking of coast guards exists, because agencies count personnel, ships, and missions differently. This comparison uses published figures for the U.S., China, Japan, India, South Korea, the Philippines, and Indonesia, and explains why size alone misleads.

Coastline length is one of geography's most measurement-dependent numbers. This ranking shows which countries have the longest coastlines, why Canada leads by a wide margin, and why different datasets disagree.

Naval power defines a country's ability to control trade routes, project power across oceans, and deny adversaries access to the seas. This ranking of the top 10 most powerful navies in 2025 covers carrier fleets, submarines, surface combatants, and total tonnage.