An additional keel secured outside the main keel, usually as protection in the event of grounding.

Measure of alkalinity or acidity in water and water containing fluids. Can be used to determine the corrosion inhibiting characteristic in water based fluids. Typically, pH > 8.0 is required to inhibit corrosion of iron and ferrous alloys in water based f ...

A suspension of fine solid or liquid particles in a gas.

Fine separated particles floating in the air and clouding it. A substance in the gaseous state.

Filled with water but afloat.

Book in which is kept a reckoning of items of cargo received or discharged from a hatch or vessel.

A person inexperienced with or uncomfortable around boats.

A cap for the top of the mast.

A phrase with a nautical derivation, meaning a man under the influence of drink or unsteadiness through drink.

Succession of long and unbroken waves that are not due to meteorological conditions in the vicinity. Generally due to wind or storms at a distance from the position.

A publication setting forth the charges, rates and rules of transportation companies.

A charted feature or chosen position on a chart

Power as calculated from compressor-indicator diagrams.

In transit, or in passage.

The sudden heave of the ship.

A short-sea vessel which transfers cargo between a central "hub" port and smaller "spoke" ports.

The first plank on the outer hull of a wooden vessel next to the keel. In steel ships, the plating next to the keel, or what is known as strake A.

Dangerously steep and breaking seas due to opposing currents and wind in a shallow area.

An empty wine bottle after its contents have been drunk.

When the sheer curves down towards the bow and stern.