GAPS
-
User Guide
3.2.1.4
Corrosion
GAPS is an electrical equipment that goes underwater. It may be submitted to differences of
potential that can lead to the corrosion of the mechanical structure of the antenna.
It is your responsibility to minimize the differences of potential between the GAPS antenna
and the surrounding structures. The GAPS antenna must benefit from the electrolytic
protection of the vessel.
Contact iXblue technical support if you notice corrosion damages on the 8 titanium screws
holding the GAPS or directly on the antenna housing (ex: blisters of the paint).
3.2.2
P
RINCIPLES
H1
When you set up GAPS on the ship, it is recommended to set the hydrophone H1 towards the
bow of the ship. Positioning H1 towards the bow generates more drag but, in this position, the
acoustic noise is reduced.
Electrical
Insulation
In case GAPS is fixed on metallic plates of different materials (electro-chemical potential,
aluminum for example) it is necessary to electrically insulate it in order to avoid any electro-
galvanic reaction that will result in structure corrosion and GAPS acoustic array fouling.
Location and
Dimensions
There must be enough space for the wire way on the connector side of GAPS. GAPS is fixed
using the eight M8 screws.
The torque to mount the eight M8 screws must be from 15 Nm to 17 Nm. There is no need to
use Loctite glue or similar.
see Appendix Lthe dimensions of the antenna on the mechanical drawing.
Misalignment
You can intentionally tilt the GAPS antenna in any directions as long as you precisely measure
the tilt angles. The angle values have to be entered into the Web-based User Interface during
the configuration of the antenna. 4.3.
Antennas
exchange
If you wish to exchange one acoustic antenna by another one on the same GAPS BOX, follow
the procedure below:
1.
Turn OFF the GAPS BOX.
2.
Exchange the GAPS acoustic antenna.
3.
Turn ON the GAPS BOX.
4.
Wait one minute.
5.
Turn OFF and ON the GAPS BOX
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MU-GAPS-AN-005-H - November 2019
Summary of Contents for GAPS
Page 1: ...GAPS Positioning System User Guide...
Page 2: ......
Page 22: ...GAPS User Guide Figure 7 HiSys hoisting system 22 MU GAPS AN 005 H November 2019...
Page 112: ...GAPS User Guide Figure 52 Mobile properties window 112 MU GAPS AN 005 H November 2019...
Page 228: ...PAGE INTENTIONALLY LEFT BLANK 228 MU GAPS AN 005 H November 2019 GAPS User Guide...
Page 229: ...GAPS User Guide L GAPS Antenna Mechanical Drawing MU GAPS AN 005 H November 2019 229...
Page 231: ...GAPS User Guide N GAPS BOX Mechanical Drawing MU GAPS AN 005 H November 2019 231...
Page 232: ...GAPS User Guide O Rackable GAPS BOX Mechanical Drawing 232 MU GAPS AN 005 H November 2019...
