TERM Definition

Question 1

Outline the following term: Nominal range

Answer 1

The Nominal Range of a light is its Luminous Range for a meteorological visibility of 10 miles. The light’s Intensity in candelas may be converted to Nominal Range with the Luminous Range diagram’

Question 2

Outline the following term: Luminous range

Answer 2

The Luminous Range of a light is the maximum distance at which it can be seen, determined only by
its intensity and the prevailing visibility. Luminous Range takes no account of Elevation, observer’s height
of eye or the curvature of the Earth.

Question 3

Outline the following term: Geographical range.

Answer 3

The Geographical Range of a light is the maximum distance at which a light can reach an observer as
determined by the height of the observer, the light’s Elevation and the curvature of the Earth

Question 4

Outline the term:
Standard Time.

Answer 4

Standard Time; The legal time of a country. May not be directly related to longitude

Question 5

Outline the term:
Daylight Saving Time.

Answer 5

Daylight Saving Time; An adjustment of Standard Time during summer months

Question 6

Outline the term:
Local Time in a port;

Answer 6

Local Time in a port; Standard Time of the country, may be Daylight Saving Time.

Question 7

Outline the term:
Local Mean Time.

Answer 7

Local Mean Time; Related to the Mean Sun, Universal Time ± Longitude in Time

Question 8

Outline the term:
Zone Time.

Answer 8

Zone Time; Kept by vessels at sea, Longitude in Time to the nearest whole hour

Question 9

Outline the term:
Longitude Into Time (Arc to time conversion).

Answer 9

Longitude Into Time (Arc to time conversion). Longitude ÷ 15. (360° ÷ 24:00 = 15° / hour.)