CATNTC

FEATURE OBJECT ATTRIBUTES

Attribute: Category of natural conditions

Acronym: CATNTC Code : ?

Camel case: categoryOfNaturalConditions

Attribute type: E

Expected input:

ID Meaning INT 1 M-4

1 wind

2 swell

3 current

4 tidal stream

5 overfalls

6 tide

7 sea level

8 magnetic variation

9 magnetic anomaly

10 ice information

11 sea water characteristics

12 visibility

13 precipitation

14 air temperature

15 humidity

Definitions:

wind:

Moving air, especially a natural and perceptible movement of air, parallel to or along the earth's surface.

swell:

The wave motion of the sea surface caused by a meteorological disturbance, which persists after the disturbance has died down or moved away. (The Mariner's Handbook)

current:

The non-tidal horizontal movement of the sea which may be in the upper, lower or in all layers. In some areas this movement may be nearly constant in rate and direction while in others it may vary seasonally of fluctuate with changes in meterorological conditions. The term is often used improperly to denote tidal streams. (The Mariner's Handbook)

tidal stream:

The alternating horizontal movement of water associated with the rise and fall of the tide. (The Mariner's Handbook)

overfalls:

Also known as tide-rips. Turbulence associated with the flow of strong tidal streams over abrupt changes in depth, or with the meeting of tidal streams flowing from different directions. (The Mariner's Handbook)

tide:

The alternate rising and falling of the sea due to the attraction of the moon and the sun. (Concise Oxford English Dictionary)

sea level:

Information about variations in sea level due to surges, winds, barometric pressure and other non-tidal causes; and warning services or special signals if in operation.

magnetic variation:

The angle which the magnetic meridian makes with the true meridian. Called "magnetic declination" by physicists. (The Mariner's Handbook)

magnetic anomaly:

An effect, permanently superimposed on the Earth's normal magnetic field and characterised by abnormal values of the elements of compass variation, dip, and geomagnetic force. (The Mariner's Handbook)

ice information:

The seasons and dates when navigation is restricted by ice; areas where icebergs may be encountered.

sea water characteristics:

The general nature of seawater including salinity, density, surface temperature, colour and transparency, and bioluminescence.

visibility:

The greatest distance under given weather conditions to which it is possible to see without instrumental assistance. (www.answers.com)

precipitation:

Rain, snow, sleet, or hail that falls to or condenses on the ground. (OED)

air temperature:

A measurement that indicates how hot or cold the air is (adapted from http://www.merriam-webster.com/dictionary/temperature 15.04.2014)

humidity:

A moderate degree of wetness especially of the atmosphere (http://www.merriam-webster.com/dictionary/humidity 15.04.2014)

Remarks:

No remarks.

Distinction:

Justification:
New attribute

Comment:

No comments.

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David	Jens
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