Furuno VR-7000S Installation Manual page 13

1.2.2 Float-free data recording unit VR-7021F
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-7020, see
section 1.2.1.
Note: The IMO obliges that VDR-equipped ships must carry a float-free DRU. The fol-
lowing is an excerpt from the regulation. Observe the following location/installation
conditions.
• The float-free DRU must be installed in the vicinity of the navigation bridge, i.e. on
the wings of the navigation bridge. Access via vertical ladder should not be accept-
ed. A location on the top of the wheelhouse may be accepted to fulfill the require-
ment if accessible by stairs.
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 hand-
rail 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 capsule
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 correct-
ly to prevent its being trapped in the ship's structure 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.
• The cover of the float-free DRU should be attached correctly. If the cover is not at-
tached correctly, the cover and capsule may drop out of the bracket due to wind
and/or vibration. For how to attach the cover, see "How to attach the
cover" on page 1-13.
1. MOUNTING
1-5