(IV-7-3) General Safety

Rules IV Industrial Services
Part 7 Offshore Technology
Chapter 3 General Safety
Section 2
Marking Platform
Section 2
Marking Platform
A General ....................................................................................................................... 2-1
B Substation Marking Equipment................................................................................... 2-1
A
General
A.1 Visual marking
A.1.1 The parts of substructure above the water level as well as the topsides of the installation shall
be painted according to local authority requirements to facilitate best visibility for the ship traffic (e.g. yellow,
see e.g. IALA O-139).
A.1.2 The installation shall be also marked with nameplates for close-up range identification, visible
from all sides of the platform. The identification marking shall be visible during day and night time and
shall be illuminated during darkness. Identification shall be generally provided with black letters/numbers
of 1m height on yellow background.
Detailed font type, location and illumination of identification marking shall be agreed with the local authority.
For the installation in German waters for example please refer to the requirements (WSD Richtlinie)
for an approved “Kennzeichnungskonzept” and “Umsetzungsplan”.
B
Substation Marking Equipment
B.1 Offshore units and installations fixed at the operation site are to be equipped with nautical
facilities conforming to the IALA Recommendations for the Marking of Man-made Offshore Structures
(IALA O-139) and the requirements for safety of navigation of the coastal state in whose waters the site is
located. These may include signal lights and sound signaling devices for fog as well as other systems
such as Radar beacons, Sonar or Automatic Identification System (AIS, see IALA A-126).
B.2 AIS, signal lights and sound signalling devices for fog which transmit a coded signal for the
identification of the offshore structure are to be provided with their own emergency battery. The capacity
of this battery, assuming simultaneous operation of all consumers, is to be rated to provide a supply for at
least 96 hours, unless some other period is specified by national regulations.
B.3 The coding and range of the radio, visual and sound signalling equipment are governed by the
national regulations relating to the site.
B.4 The switchboard for the signalling equipment is preferably to be sited in a permanently
manned room, e.g. the control station or an equivalent location. The switchboard IP rating shall be in line
with its installation location according to the requirements as set out in GL Rules for Electrical Equipment
(IV-7-5).
B.5 Each signalling device is to be supplied from the switchboard by its own feeder which is to be
protected by a fuse or automatic circuit breaker.
B.6 The failure of a signalling device is to be indicated visually and audibly and shall be also indicated
in the station control system.
B.7 The switchboards are to be supplied from the emergency switchboard and a suitable emergency
battery fulfilling the requirements as mentioned in GL Rules for Electrical Equipment (IV-7-5).
Edition 2013 Germanischer Lloyd Page 2–1