Data Recording Unit (Dru) - Furuno VR-7000S Installation Manual

1.2

Data Recording Unit (DRU)

1.2.1 Fixed data recording unit VR-7020
The fixed DRU shall be sited in the vicinity of the bridge on the external deck area of
the vessel so as to maximize the probability of its survival and recovery following an
incident.
VR-7000S systems have either a fixed data recording unit (VR-7020) or a float-free
data recording unit (VR-7021F). For configurations that use the VR-7021F, see
section 1.2.2.
Mounting consideration
Select a mounting location, keeping in mind the following points:
• Select the mounting location considering the facilitation of underwater removal and
retrieval by both divers and ROVs. There should be a clear unobstructed space in
the vicinity of the capsule to allow an ROV or diver to work.
• Locate the unit as near to the center line of the ship as possible.
• Locate the unit away from fuel or other potential fire sources.
• Locate the unit away from probable sources of the mechanical damage.
• Make the maintenance space for maintenance and checking purpose.
Mounting
To install the fixed DRU, do the following:
1. Verify that the fixed DRU mounting base lines up with the hull mounting holes. Re-
fer to the figure on the next page for the fixed DRU mounting base template pat-
tern.
2. Ensure the paint around the bottom of the mounting holes on the fixed DRU and
hull mounting brackets is removed.
3. Apply the supplied silicone rubber (S-8400W) around the mounting holes on the
fixed DRU and hull mounting brackets.
4. Install three lock washers (supplied).
5. Insert bolts through the hull mounting brackets.
6. Fix the fixed DRU with the supplied installation materials.
See the figure "Hull Grounding Technique" on the next page.
1. MOUNTING
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