Chapter 2: Installing the system
18
Placing the antenna
FB250 compact dome antenna mast length
The below table shows the values for an FB250 compact dome
antenna mast
without stays or wires. Note that these values are only guidelines - always
consider the environment and characteristics of the ship before deciding on
the mast dimensions.
The mast mount kit interfaces to a 1½” tube (OD 48.3 mm - absolute maximum
OD 52 mm). Masts with larger diameters must be tapered and the upper part
of the tube (approximately 50 mm) must have a diameter of 1½”.
OD
(mm)
Wall
Thickness
(mm)
Weight
(kg/m)
Inertia
(X10
6
mm
4
)
Max. free mast length
(steel), m
48.3
3.25
3.61
0.117
< 0.6
48.3
4.05
4.43
0.139
50
3.00
3.48
0.123
60.3
3.65
5.10
0.262
<0.8
60.3
4.50
6.17
0.309
76.1
3.65
6.80
0.547
< 1.0
76.1
4.50
7.90
0.651
88.9
4.05
8.47
0.974
< 1.1
88.9
4.85
10.10
1.140
Summary of Contents for FB250
Page 13: ...Table of contents xii ...
Page 77: ...Chapter 3 Connecting power 64 Connecting power ...
Page 105: ...Chapter 5 Starting up the system 92 Operating the system ...
Page 129: ...Chapter 6 Service and repair 116 Replacing modules in 34 3052B antenna ...
Page 139: ...Chapter 7 Troubleshooting 126 Logging of events ...
Page 165: ...Appendix B Technical specifications 152 TracPhone terminal ...
Page 197: ...Glossary 184 ...
