A safety device, used to fasten a propeller to its shaft; it breaks when the propeller hits a solid object, thus preventing further damage.

A basin for receiving a vessel for repairs, capable of being pumped dry (to repair vessel and scrape marine growth from bottom).

The charge in a company's accounts which reflects the reduction in value of an asset over time as.

Hypocritical smile, or sneer.

Refrigeration equipment attachable to an insulated container that does not have its own refrigeration unit.

An anchor carried at the stern.

A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.

Is a process taking place under constant pressure. To change the volume from state 1 to state 2, heat must be removed. The temperature change is proportional to the change in specific volume.

Lifting device attached to a crane.

Correct alignment of the optical parts of an instrument.

A unit used in comparing freight earnings or expenses. The amount earned from the cost of hauling a ton of freight one mile.- The movement of a ton of freight one mile.

Floor of the cockpit.

Used in meteorology to describe a mass of cold air moving toward a mass of warm air. Strong winds and rain typically accompany a cold front.

A crossbeam at the upper part of an anchor.

A navigational light with a steady beam of light, having no intervals of darkness.

Beat to windward to avoid being driven onto a lee shore.

Clean galley and mess halls, set tables, prepare salads, clean living quarters.

on square-rigged ships, a platform at the masthead resting on the trestletrees and crosstrees. In addition to being a work platform, it extended the topmast shrouds to give additional support to the topmast.

A device for mounting cylinders.

Is the ambient gas temperature as indicated by a standard thermometer.