Raymarine e7 - 9.4 Radar range and image quality

Poweringtheradarscanneronandoff
Intheradarapplication:
1.SelectMenu.
2.SelectPowertoswitchtheRadar’spowerOnandOff.
TheradarwillalwayspowerupinStandbymode.
3.SelectRadartoswitchtheradarbetweenTransmitandStandby
modes.
Usingthepowerbuttonandtouchtoswitchoperatingmodes
Theradaroperatingmodescanalsobesetusingthemultifunction
displayspowerbuttonmenu.
1.PressandreleasethePowerbutton
2.SelectStartRadarTXtostarttheradartransmitting.
3.SelectStopRadarTXtoputtheradarintostandby.
Usingthepowerbuttontoswitchoperatingmodes
Theradaroperatingmodescanalsobesetusingthemultifunction
displayspowerbuttonmenu.
1.PressandreleasethePowerbutton
2.PressthePowerbuttonagainsothatStartRadarTXis
highlighted.
WiththeDisplayBrightnessdialogopenpressingthePower
buttonwillswitchbetweenTransmitandStandby.
9.4Radarrangeandimagequality
Maximumradarrange
Theusablerangeoftheradarislimitedbyfactorssuchasthe
heightofthescanner,andheightofthetarget.
Maximumradarrangeisessentiallyline-of-sight,soislimitedby
theheightofthescannerandtheheightofthetargetasillustrated
below:
a
1
a
2
h
H
D16 43 -4
R
max
R
max
= 2.23 ( h + H )
1
3
2
ItemDescription
1Radarequippedvessel.
2
Curvatureoftheearth.
3
Target(Cliff).
a
1
Radarhorizonofantenna.
a
2
Radarhorizonoftarget.
R
max
Maximumradarrangeinnautical
miles.
R
max
=a
1
+a
2
hRadarantennaheightinmetres.
HTargetheightinmetres.
Usingradar
137