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

1.2

Data Recording Unit (DRU)

The protective capsule 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 follow-
ing an incident. The capsule shall be positioned clear of rigging and other potential ob-
structions and as near to the center line of the ship as practically possible.
Mounting consideration
Criteria to be considered when assessing the optimum position shall include but not
be limited to the following:
• separation from fuel or other potential fire sources;
• separation from probable sources of the mechanical damage;
• operational environment for continued serviceability;
• accessibility for routine maintenance;
• 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;
• in case of float-free recording medium, minimization of the risk of obstruction after
release;
1.2.1 Fixed data recording unit VR-7020
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 silicone sealant (S-8400W, supplied) 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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