NR 610, Chap 1, Sec 1
18 Bureau Veritas December 2018
2.3.3 Survey periodicity
Diving systems are subject to the following in-service sur-
veys witnessed by the Society:
• annual surveys (to be conducted within +/− 3 months of
anniversary date)
Note 1: The scope of the annual survey may differ from one year to
the other as the periodicity of inspection and testing may be
different for each component.
• intermediate surveys (to be conducted within +/− 3
months of the second anniversary date or within +/− 3
months of the third anniversary date)
• class renewal surveys, every 5 years (to be conducted
no earlier than 15 months before and no later than anni-
versary date or 3 months after anniversary date in
exceptional circumstances)
• occasional surveys for damage, repairs, reactivation and
alterations.
2.3.4 Owner surveys
In addition to the in-service surveys witnessed by the Soci-
ety, the Owner is to perform semi-annual surveys as
detailed in Ch 4, Sec 2, [2.4].
These surveys are to be recorded in the Planned mainte-
nance System.
2.3.5 Modifications and repairs
The Owner shall inform the Society in case of modifications
or repair as detailed in Ch 4, Sec 2, [1.3].
A design review may be necessary with relevant surveys. In
that case, the original certificate of classification may have
to be completed with a description of the modifications.
2.3.6 Portable diving systems
The Owner is to inform the Society about any installation
and decommissioning operations of a portable diving sys-
tem.
The portable diving system is to be inspected in accordance
with Ch 4, Sec 2, [3] before it is put back into service.
2.4 Suspension and withdrawal of class cer-
tificate
2.4.1 The class certificate would cease to be valid if signifi-
cant alterations have been made to the diving system with-
out the agreement of the Society, except for the replacement
of such equipment or fittings for the purpose of repair or
maintenance, or if surveys and inspections as specified by
the Society under the provisions of Chapter 4 have not been
carried out.
2.4.2 The class certificate would cease to be valid if the
diving system is operated beyond its approved rated depth.
2.5 Classification of the diving support unit
2.5.1 The classification of the diving support unit is cov-
ered by Part E, Chapter 7 of the Ship Rules (see [6.3.1]).
2.5.2 Integrated diving systems
When the integrated diving system is classed by the Society,
it is to be mentioned in the certificate of classification of the
ship.
2.5.3 Portable diving systems
The classification of portable diving systems and the classifi-
cation of diving support units are independent.
3 Classification notations
3.1 Types of notations assigned
3.1.1 The types of classification notations assigned to a div-
ing system are the following:
a) a class symbol as per [3.2]
b) a construction mark as per [3.3]
c) a service notation with an additional service feature as
per [3.4].
3.1.2 As an example, the classification notations assigned
to a diving system may be as follows (the kind of notation
shown in brackets does not form part of the classification
notation indicated on the Certificate of Classification):
I
{ Diving system - integrated
(class symbol, construction mark, service notation)
SATURATION
(additional service feature)
3.2 Class symbol
3.2.1 The class symbol expresses the degree of compliance
of the diving system with the rule requirements as regards
its construction and maintenance. There is one class sym-
bol, which is compulsory for every classed diving system.
3.2.2 The class symbol I is assigned to diving systems built
in accordance with the requirements of the Rules or other
rules recognized as equivalent, and maintained in a condi-
tion considered satisfactory by the Society.
The period of class (or interval between class renewal sur-
veys) assigned to class symbol I diving systems is maximum
5 years.
3.3 Construction mark
3.3.1 General
The construction mark identifies the procedure under which
the diving system has been surveyed for initial assignment
of the class.
The construction mark refers to the original condition of the
diving system. However, the Society may change the con-
struction mark when the diving system is subjected to
repairs, conversion or alterations.