Installation manual

Trawl hydrophone installation
103
851-165187 / Rev.A
Vessels operation in colder climates should weld steel fins and
protection plates installed around hydrophones to protect them
from being damaged by ice. Detailed drawing must be made
specifically to suite each individual vessel in question and the
installation performed by an authority with the expertise to do
so.
Surface protection
Maintenance and replacement costs can be reduced if those parts
of the hydrophone installation that are open to the sea are
protected correctly. Any new metal or original plating involved
in the hydrophone installation which has been cut, sand-blasted,
welded or otherwise had its protective coating compromised
must be thoroughly cleaned and repainted. For steel vessels use
polyester primer, undercoat and top-coat according to the
manufacture’ s instructions, then apply the same anti-fouling
paint used on the rest of the hull.
Hydrophone face
This is Simrad’s list of approved antifouling paints for
hydrophone faces.
From Jotun Paints, S andefjord Norway:
• Antifouling Seamate HB 33, HB 66 and HB 99
• Racing
• Non-stop
From International Paints:
• Intersleek tie coat + 425 FCS
- BXA386/BXA390/BXA391 Grey
- HKA563/HKA570/HKA571 Yellow
Mix BXA386, BXA390 and BXA391 first, then apply. When
dry, mix HKA563, HKA570 and HKA571, apply.
From Hempel IFA Coatings AS:
• Hempel A/F Classic 76550
From Jotun-Henry Clark Ltd:
• Anti-fouling Seaguardian
From International Marine Coatings:
• Intersmooth 360 Ecoloflex SPC
• Micron Ekstra
Note: Refer to the manufacturer’s documentation and data sheets for a
complete procedure.