Bedienungsanleitung Interphase CHART MASTER V6 (Seite 61 von 89) (Englisch)

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User Manual

♦ RTCM = Radio Technical Commission for Maritime Services

The data format created by the Radio Technical Commission Maritime to trans-

mit Differential GPS corrections.

♦ SNR = Signal to Noise Ratio

It is the ratio between the magnitude of a radio signal and the magnitude of

the noise (that is, the interferences). The SRN is expressed in decibels and it

is associated to the GPS satellites signal quality.

♦ SOG = Speed Over Ground

The current velocity at which the vessel is travelling, relative to a ground

location. The SOG is normally provided by the GPS sensor.

♦ SPD = Speed Through Water

The speed of the vessel relative to the water.

♦ Spot Sounding

It is the depth of the water in a specific and charted position. It is represented

on the map by its own value expressed in the current depth unit.

♦ STR = Steering

The difference between COG and CTS. If COG is 25° and CTS is 30°, then STR

is 5° Right.

♦ TD = Time Difference

Loran positions are determined by precise timing of the intervals between

reception of pulses transmitted by pairs of stations in the selected chain. Be-

tween any two stations a ship must be located somewhere along a line of

possible positions where the measured Time Difference, TD, between arrival

of pulses from those stations would be observed. The TD is measured from

the time of reception of the master station signal to the time of reception of

the slave station signal (see also Pair).

♦ Tide

The periodic rise and fall of the surface of oceans, bays, etc., due principally to

the gravitational interactions between the Moon and Earth.

♦ Tide Info

The Tide Info feature is the combination of a new tide heights database that

will be included within new C-CARDs and new features which calculate the tide

graph for all primary and secondary ports world-wide. This function can calcu-

late the tide heights for any past or future date and as a by-product of this

calculation will also display the Maximum and Minimum Tide height and time

for the day selected plus the times of Sunrise and Sunset. At some chart

levels, the chart plotter will display a new Tide Diamond Symbol for every Port

or tide point in the database covered by that particular C-CARD.

♦ Tracks + Routes

Recommended and established routes for ships at sea, including traffic sepa-

ration schemes, deep water routes.

♦ TRN = Turning

The difference between COG and BRG. If COG is 80° and BRG is 75°, TRN is 5°

Left.

♦ TTG = Time To Go

The estimated time needed to reach your destination, based on your current

speed and the distance to destination.

♦ TWD = True Wind Direction

Direction of the Wind relative to a fixed point on the earth.

♦ TWS = True Wind Speed

Velocity of the Wind relative to a fixed point on the earth.

♦ Underwater Objects

Objects like obstruction, wreck, cable…

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Interphase CHART MASTER V6 Seite 61

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