Red vessels on some hidden rock, reef or sand, and by night exposing characteristic lights. Their object is to mark outstanding dangers or port approaches.

The light-water reactor (LWR) is a type of thermal-neutron reactor that uses normal water, as opposed to heavy water, as both its coolant and neutron moderator.

A procedure which involves auditing all items which are to be added, deducted or relocated on the ship at the time of the inclining test so that the observed condition of the ship can be adjusted to the lightship condition.

Lignite, often referred to as brown coal, is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat.

Lignocellulose refers to plant dry matter (biomass), so called lignocellulosic biomass.

A small hole cut in a plate near the bottom of the frame or other structural member to permit the passage of water or oil.

Limescale is a hard chalky deposit, consisting mainly of calcium carbonate (CaCO3), that often builds up inside kettles, hot water boilers, and pipework, especially that for hot water.

Cutter blades mounted on the propeller to sever fishing lines, drift nets or discarded tow lines and hawsers.

Line regulation is the ability of a power supply to maintain a constant output voltage despite changes to the input voltage, with the output current drawn from the power supply remaining constant.

A gun or rocket device which can project a light line between vessels.

A linear circuit is an electronic circuit which obeys the superposition principle.

In electronics, a linear regulator is a system used to maintain a steady voltage.

In the linear winding method, a winding is produced by winding the wire onto a rotating coil body, component or coil carrying or coil forming device.

Line-commutated indicates that the conversion process relies on the line voltage of the AC system to which the converter is connected in order to effect the commutation from one switching device to its neighbour.

A lineman is a tradesman who constructs and maintains electric power transmission and distribution lines.

Shipping companies operating a service in common between designated areas. Conference partners agree on special freight rates and terms for the trade in order to stabilize market and service.

Cargo ships (liners) operating on fixed itineraries or regular schedules and established rates available to all shippers.

A set of lines showing the moulded form of the hull projected on three planes perpendicular to each other.

A lineworker is a tradesman who constructs and maintains electric power transmission and distribution lines.

Adjustable bridge ramp at specially-constructed berth, designed to link up with axial stern ramps of ro-ro vessels.