Gas carrier ships transport some of the most hazardous cargoes at sea — liquefied gases like LPG, ammonia, ethylene, and chlorine. These substances are kept in a liquid state only because of the high pressure or low temperature maintained inside specially designed cargo tanks. When those conditions are disrupted — whether by fire, mechanical failure,…

Major overhauling, commonly known as D’carb, is a critical maintenance procedure for ship’s generators. These diesel-driven alternators serve as the primary power source on board, supplying electricity for propulsion auxiliaries, navigation, and life-support systems. Failure during operation can lead to blackouts, machinery damage, or safety incidents. The overhaul restores the engine and alternator to manufacturer…

Volatile Organic Compounds (VOCs) are carbon-based chemicals with high vapor pressure and low water solubility. They evaporate easily into the air at room temperature as gases from solids or liquids. Found in thousands of everyday products and industrial processes, VOCs include solvents, fuels, and by-products like benzene, formaldehyde, trichloroethylene, and methyl tert-butyl ether (MTBE). While…

Spark erosion is a silent but destructive electrical phenomenon that targets the heart of a ship’s main propulsion engine. It occurs when stray currents from the vessel’s impressed current cathodic protection (ICCP) system discharge through the propeller shaft and into the engine bearings. The result is rapid pitting, grooving, and material loss on critical white-metal-lined…

A ship’s generator is the single most critical piece of machinery onboard. Every navigation system, safety system, accommodation service, and auxiliary function depends on the continuous, stable supply of electrical power it provides. When that generator begins showing signs of developing failure, the margin between a controlled shutdown and a catastrophic breakdown — a full…

Every operating ship produces two categories of oily waste that must be managed carefully: sludge — the heavy residue generated by fuel and lubricating oil systems — and bilge water — the oily liquid that accumulates at the lowest points of the engine room. Both represent environmental hazards if mishandled and legal liabilities if records…

Fire at sea is among the most catastrophic events a vessel can face. With thousands of lives aboard a modern cruise ship and no shore-based assistance within reach, the onboard fire suppression system is the only line of defence between a manageable incident and a disaster. Over the past two decades, the industry has moved…

A Remotely Operated Underwater Vehicle (ROV) is an unmanned, tethered underwater robot controlled by operators on a surface vessel or platform. Unlike submarines or human divers, ROVs eliminate the risks of sending people into extreme-depth environments while delivering real-time video, data, and physical intervention capabilities far beyond human reach. ROVs are central to offshore oil…

Bunker fuel is the single largest variable cost in ship operations, accounting for 50–80% of a voyage’s total expense. Unlike terminal handling charges or port dues, fuel spend is not a fixed function of cargo volumes—it responds directly to operational decisions made on the bridge, in the engine room, and at the procurement desk. That…

Modern cruise ships are essentially floating cities. A large vessel can carry 5,000 or more passengers and crew, generating up to 1,000 cubic metres of wastewater every single day. Managing that wastewater — especially blackwater — is one of the most technically demanding and environmentally critical responsibilities in cruise ship operations. This article explains what…