Sperry Marine VISIONMASTER FT ECDIS-E, User Manual

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ECDIS-E User Guide Electronic Range and Bearing Lines
65934012 10-1
Chapter 10 Electronic Range and Bearing Lines
Two electronic bearing lines (EBL) and two variable range markers (VRM)
are available in and can be displayed simultaneously or separately on the
chart display.
When an EBL is turned “On” while its associated VRM is turned “Off”, a
small line intersects the EBL at the specified VRM range. This represents
an Electronic Range and Bearing Line (ERBL).
ERBLs display distance and bearing between objects, they are shown as a
dashed orange line. VRMs display a range ring indicated by long orange
dashes and is centred on the previously created EBL.
The first and second EBL and VRM have different mark/space ratios of
dashes. Each EBL and its associated VRM are identified by having the
same dashed space ratio for the line and ring.
When an ERBL is displayed the EBL bearing
value (degrees) and VRM range value
(nautical miles) are displayed to the right of
the buttons on the EBL/VRM display.
An ERBL can be centred on the CCRP (carried), or offset to a referenced
position (carried or dropped) for example, between own ship and an object,
or positioned between any two objects on the display.