Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 192)

190 | Appendix E - Glossary

HEALTH

See SATELLITE HEALTH.

IEC

International Electro-technical Commission.

IMO

International Maritime Organization

INCLINED PLANE

A geometric surface that is tilted with respect to another arbitrary reference plane

(for example, the Earth’s equatorial plane).

INITIALIZE

To enter constants into the navigator to enable it to start positioning and/or

navigating accurately.

INTERFACE

Electronic circuits that permit the passage of data between different types of

devices; For example, the speed and heading interface circuit permits data from a

speed log and compass to pass to the navigator processor.

IONOSPHERE

A layer of ionized air about 80 kilometers (50 miles) above the earth’s surface.

IONOSPHERIC INTERFERENCE

Distortion imparted to a broadcast radio signal as it passes through the

ionosphere.

ITDMA

Incremental Time Division Multiple Access – Access protocol for pre-announced

transmissions of temporary or non-repeatable character. It is also used during

data link network entry.

ITU

International Telecommunication Union.

KALMAN FILTER

A software routine that produces the navigation solution (see NAVIGATION

SOLUTION).

KEY LOCK

Disabling the EDIT-key so that data entries cannot be inadvertently made.

LED

Light Emitting Diode.

LEG

One of the segments in a route.

LEEWAY

The leeward drift of the vessel from the true course due to wind.

LOCAL TIME ZONE

The time zone (see TIME ZONE) in which the navigator is located.

LOCAL TIME ZONE OFFSET

The number of hours by which the local time zone differs from Universal Time

Coordinated.

LORAN-C TIME DIFFERENCES (TDs)

The phantom Loran-C Time Differences used in the navigator are based on

mathematical models. Local deviations in propagation speed and Additional

Secondary Factors (ASF) are not included in the algorithm. The calculated

positions may therefore differ from positions obtained when using a dedicated

Loran-C receiver by several hundred meters.

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