Data Recording Unit - Furuno VR-3000 Installation Manual

1.3 Data Recording Unit

The DRU contains a protective capsule and it should be installed in the vicinity of the bridge on
the open deck area of the vessel. This will maximize the probability of its survival and facilitate
recovery following an incident. The DRU should be positioned clear of rigging and other
potential obstructions and as near to the centerline of the ship as possible. Constructing a
"fence" around the DRU is recommended.
1.3.1 Installation considerations
•
Must be separated from fuel or other potential fire hazards.
•
Must be separated from probable sources of mechanical damage.
•
Must be separated at least 4m from VHF/MF/HF antenna.
•
Must be installed in a place that facilitates routing maintenance and copying of recorded data.
•
Must be installed where a diver or remote operated vehicle could remove and retrieve.
•
There should be a clear and unobstructed area around the DRU to allow a diver or an ROV to
work.
1.3.2 Fixed-type DRU
Mounting
The DRU comes with the mounting bracket fitted. Request shipyard to construct a mounting
base for the DRU. (An example of one is shown on page 33.) On the mounting base, mount the
bracket with M8 bolts and nuts (double nuts). The gap between vibration absorber and bolt
should be at least 3 mm.
Projection
Band
Cradle
Projection
Note: If you once detach the main body from the mounting bracket, fix the main body as shown
in the figure above so that the acoustic beacon is horizontal. Then, the main body is securely
fixed by the band.
How to detach the main body
1. Remove two snap pins.
2. Remove two hinge pins.
3. Lift the release levers and detach the main body.
Hinge pin
Acoustic beacon
Vibration absorber
A: details
A
Gap
More than 3 mm
Release lever
Snap pin
5