Antenna Unit Gs-1001 - Furuno GS-100 Operator's Manual

8. INSTALLATION
8.2.2

Antenna unit GS-1001

General considerations
When selecting a mounting location, keep in mind the following points:
• Observe the compass safe distances shown in the Safety Instructions (page iii) to
prevent interference to a magnetic compass.
• The vibration should be less than 5 G. (Recommended less than 1.5 G.)
• The sensor should be separated as far as possible from the radar mast. (Recom-
mended double height of the sensor mast.)
• The distance from the installation surface must be more than 1.5 meters. (See page
D-4.)
• The sensor should be separated more than three meters from any TX antenna (for
inmarsat or radiotelephone).
To prevent the shading and multipath problems which occur as shown in the figure be-
low, follow the procedure in the next topic "Mounting location" to select a mounting lo-
cation.
Location influenced
by reflected wave.
GS-100 Sensor
(improper site)
Mounting location
The mounting location must satisfy the following four conditions. After selecting the lo-
cation, determine the mounting height, following the procedure in the next topic.
CONDITION 1: Locate the GS-100 sensor away from masts that might prevent
reception of the GPS signal
• Mount the sensor where the field of view against zenith is at least ±85°. The mount-
ing location should be as high as possible, above masts, etc. that might interfere
with reception.
8-4
Radar antenna
Reception blocked by radar mast.
Bridge
85° 85°
GS-100