Float-Free Data Recording Unit - Furuno VR-7000 Installation Manual

1.2.2 Float-free data recording unit VR-7021F
Mounting consideration
Select a mounting location, keeping in mind the following points:
• The float-free DRU should, with greatest possible probability, float-free and avoid
being caught in railings, superstructure, etc., if the ship sinks.
• The float-free DRU should be located so that it may be easily released manually and
brought to the survival craft by one person. It should therefore not be located in a
radar mast or any other places which can only be reached by vertical ladder.
• Fix the float-free DRU vertically on the bulkhead or
handrail so that the cable entrance faces downward.
Ensure that the steel hull or plate where the bracket is
mounted is completely flat. If it is uneven, the capsule
may not make good contact with the docking module.
• Confirm that a buoyant lanyard is attached to the cap-
sule correctly. The buoyant lanyard (for tethering to life
craft) is attached to the capsule of the float-free DRU.
The buoyant lanyard must be attached to the capsule
correctly to prevent its being trapped in the ship's struc-
ture when the capsule is released.
• The float-free DRU should be marked with the ship's call sign, serial number, MMSI
number (if applicable), and 15 Hex ID before installation.
• The cable between the float-free DRU and junction box (VR-7022F) should be as
short as possible.
• Locate the unit 5m or more away from the VHF antenna.
• Locate the unit away from the equipment that generate the magnetic field.
• Ground the unit by connecting the ground plate
to the ship's body with the hex. bolt.
• Apply the silicone grease between the docking
module and storage module to prevent water
from entering (see the figure on the next page).
After applying the silicone grease, do not release
the capsule from the bracket other than the main-
tenance. If you release the capsule, apply the sil-
icone grease again when reattach it.
1. MOUNTING
Ground plate
1-5