Ships operating primarily beyond 3 nautical miles from the nearest land are encouraged to install and use comminuters to grind food wastes to a particle sizes capable of passing through a screen with openings no larger than 25 milimeters.

View without obstructions which would interfere with the navigator ability to perform all immediate tasks.

NOx suppression technique developed by Wärtsilä, whereby combustion air is humidified before entering the engine cylinder.

Capable of being ignited easily and burnt.

An instrument for measuring the contents of hydrocarbon gas/air mixtures, usually showing the result as a percentage of the lower flammable limit.

A propeller surface finish has big effect on fuel consumption. A surface finish of 70 microRa will add over 4.5 per cent to the fuel consumption bill compared with one of 10 microRa.

According to The Motor Ship December 2002 This wide-beam/shallow-draught vessel was designed for operation in the very sensitive waters of the Caribbean archipelago...

Skew angle of a propeller is the angle measured from ray “A” passing through the tip of the blade at mid-chord line to ray “B” tangent to the mid-chord line on the projected blade outline.

The aftermost section of the propulsion shafting in the stern tube in single screw ships and in the struts of multiple screw ships to which the propeller is fitted.

For connecting the propeller shaft with the intermediate shaft, a hydraulic coupling flange is used.

It is the distance at the blade tip between the generating line and the line perpendicular to the propeller axis that meets the generating line at the propeller axis.

The distance that a propeller theoretically (i.e. without slip) advances during one revolution.

A circular casing enclosing the propeller. The propeller operates with a small gap between blade tips and the nozzle internal wall, roughly at the narrowest point. The nozzle ring has a cross-section shaped like a hydrofoil.

The hub is bolted to the flanged end of the tailshaft. Without ice class, the hub diameter/propeller diameter ratio varies between 0.20 and 0.25.

The propeller is a potential source of noise and vibrations in a ship. The vibration of a propeller are strongly related to the variation in inflow velocity (wake-field), the clearance from propeller tip to hull surface and blade geometry.

The largest possible propeller diameter is preferred in order to obtain the highest possible propulsive efficiency.

In a COGES system gensets are driven by gas and steam turbines. Waste heat recovery boilers exploit the gas turbine exhaust and produce superheated steam (at around 30 bar) for the steam turbine genset.

A hybrid machinery system with a gas turbine and diesel engines driving generators to create electric power for both propulsion and the hotel side.

A novel propulsion and machinery concept developed by Wärtsilä Corporation. The concept features a diesel-mechanical part driving a conventional propeller and a diesel-electric power plant powering one or more electric pods.

The use of two different power generation processes, e.g fuel engines and steam turbines, in the same power plant. The second process utilizes the heat recovered from the first.