February 8th, 2011

Boat Nomenclature and Terminology

By Captain Bob Figular

Boat Nomenclature and Terminology

As with any profession or skill, there are special terms that mariners use.  Many of these terms have a fascinating history.  Fellow mariners will expect that these terms will be used in routine conversation.

The front end of a boat is the bow.  Moving toward the bow is going forward; when the boat moves forward, it is going ahead.  When facing the bow, the front right side is the starboard bow, and the front left side is the port bow.

The central or middle area of a boat is amidships.  The right center side is the starboard beam, and the left center side is the port beam.

The rear of a boat is the stern.  Moving toward the stern is going aft.  When the boat moves backwards, it is going astern.  Standing at the stern looking forward, the right rear section is the starboard quarter and the left rear section is the port quarter.

Starboard is the entire right side of a boat, from bow to stern and Port is the entire left side of a boat, from bow to stern.

A line or anything else running from side to side is athwartships.

Inboard is from either side of the boat toward the centerline.  However, there is a variation in the use of outboard and inboard when a boat is tied up alongside something (e.g., pier or another vessel).  In this example, the side tied up is inboard; the side away is outboard..

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Safe Boating Operations - Basic Plotting Equipment

Adequate preparation is very important in piloting a boat.  Piloting is the primary method of determining a boat’s position by using landmarks, other navigational aids, and soundings. In order for a boat operator to be able to use good judgment on all decisions with regards to navigation the proper tools and publications must be onboard and readily available. Therefore, it is important to be alert and attentive, and always be consciously aware of where your boat currently is and where it soon will be.

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Safe Boat Operations - Nautical Chart

The nautical chart is one of the mariner’s most useful and most widely used navigational aids.  Navigational charts contain a lot of information of great value to you as a boat Captain.

For the purpose of coastal navigation, the earth is considered to be a perfect sphere.  To represent the features of the earth’s spherical surface on the flat surface of a chart, a process termed “projection” is used.  The primary type of projection used in making piloting charts is called Mercator projections.

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Safe Boat Operations - Anchoring Techniques

An often-overlooked safety related operational procedure is the simple act of anchoring your boat in different sea and weather conditions.  Anchoring must be performed correctly in order to be effective.  In this Posting we will discuss the techniques necessary to properly anchor a boat.

The three basic elements of anchoring include having the proper equipment available; knowing how to use that equipment; and having the ability to select good area to anchor in.

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Understanding Marine Weather - Ocean Circulations

The fundamental reason for the world’s surface ocean currents is the sun. The heating of the earth by the sun has produced semi-permanent pressure centers near the surface. When wind blows over the ocean around these pressure centers, surface waves are generated by transferring some of the wind’s energy, in the form of momentum, from the air to the water. This constant push on the surface of the ocean is the force that forms the surface currents.

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