(1) To adjust the sails for best advantage. (2) Fore and aft balance of a boat. If either the bow or stern is depressed, the vessel is said to be down by the bow or down by the stern. (3) To trim is to adjust. It does not just apply to sheets. You can tri ...

The angle to the horizontal at which a vessel rides.

Trim And Stability Booklet

An adjustable section of the rudder that allows the rudder to be corrected for lee helm or weather helm.

A multihulled boat with three hulls.

To let go.

The act of breaking out the flukes of an anchor if they are caught on some obstruction, preventing it from being normally weighed.

This represents three layers of glazing in a window with an airspace between the middle glass and the exterior and interior panes.

The temperature at which all three phases of a substance can exist in equilibrium. This temperature occurs at only one pressure. The triple-point of water is 273.16 K and is the basis of the Kelvin scale.

A line attached to the crown of an anchor and used to help free it in the event it becomes fouled.

A line used for capsizing the sea anchor and hauling it in.

A wall with high thermal mass used to store solar energy passively in a solar home. The wall absorbs solar energy and transfers it to the space behind the wall by means of radiation and by convection currents moving through spaces under, in front of, and ...

The region around the equator between the Tropic of Cancer and the Tropic of Capricorn. The tropics are known for their warm weather.

The boundary between the troposphere and stratosphere, usually characterized by an abrupt change in lapse rate. Its height varies from 10 to 20 km. Regions above the tropopause have greater atmospheric stability than regions below.

An elongated area of relatively low atmospheric pressure. Usually associated with and most clearly identified as an area of maximum cyclonic curvature of the wind flow. The opposite of a ridge.

The bottom of a wave, the valley between the crests.

Tropical Revolving Storm

A cap for the top of the mast.

The flat circular piece secured on the top of the mast.

A course steered by the compass that has been corrected for variation and deviation