Site considerations
98-175666-A Chapter 2: Installation 2-10
Mast length (100 cm)
The below tables show the minimum dimensions for a SAILOR XTR Ka ADU mast with
and without stays or wires. Note that the values are only guidelines - always consider the
environment and characteristics of the ship before deciding on the mast dimensions.
The tables list the values for steel masts. For aluminium masts, the
free mast length is reduced to 75% of the values for steel.
Bracing and rigid masts can still not prevent vertical vibration if the mast
is attached to a deck plate that is not rigid. Make every effort to mount
the mast on a surface that is well supported by ribs. If this is not possible,
provide extra deck plate propping.
Mast without
braces
Max. free mast
length (steel),
(m)
Outer
diameter
(mm)
Wall
thickness
(mm)
Weight
(kg/m)
0.4
a
a. The height of 0.4 m is not recommended to be used as it will make access through the
ADU’s service hatch difficult.
200 5 24.0
0.6 220 5 26.5
0.8 250 5 30.2
1270532.7
Table 2-3: Mast dimensions without braces
Mast with 3 braces
Max. free
mast
length
(steel), (m)
Outer
Diameter
(mm)
Wall
Thickness
(mm)
Outer
Diameter
for brace
(mm)
Thickness
for brace
(mm)
1.2 140 10 50 5.0
1.2 200 5 50 5.0
1.6 140 10 70 5.0
1.6 200 5 70 5.0
2 160 10 70 5.0
22205705.0
2.5 180 10 80 5.0
2.5 220 5 80 5.0
Table 2-4: Mast dimensions with 3 braces
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