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DNV-OSS-101 Rules for Classification of Offshore Drilling and Support Units
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Ch.1 Sec.5
B 300 Conditions and Memoranda
Ch.1 Sec.5 B
301 A Condition of Class (CC) will be imposed for the following:| — | repairs and/or renewals related to damage,
defect or breakdown that are sufficiently serious to affect Classification
(e.g. grounding, structural damages, machinery damages, wastage
over the allowable limits etc.) |
| — | supplementary survey requirements |
| — | temporary repairs. |
Guidance note:
When the Society has been authorised to carry out a statutory
survey, a Condition on behalf of the flag Administration (CA) will
be imposed for specific measures, repairs or surveys that should
be carried out within a specific time limit in order to retain the
statutory certificate.---e-n-d---o-f---G-u-i-d-a-n-c-e---n-o-t-e---
Ch.1 Sec.5 B
302 The Society will issue a CC when deemed necessary to carry
out examinations in order to ascertain whether damage, a defect
or a deficiency has been sustained or is imminent.
Ch.1 Sec.5 B
303 A CC may contain the following:| — | a description of the deficiency, defect, damage
or the examination required |
| — | required action |
| — | due date for the required action to be completed |
| — | possible temporary requirements imposed until the required
action has been completed. |
Alternatively the CC may refer to a survey report for above
details.
An approved repair method may be recommended as part of the
required action.
Ch.1 Sec.5 B
304 If a CC seriously affects the vessel's safety and
reliability, immediate action will be required. Otherwise a time
limit will be given for the action to be completed.
Ch.1 Sec.5 B
305 A CC will be deleted when the Society, through a survey or
received information, has been satisfied that requested action has
been satisfactory completed.
Ch.1 Sec.5 B
306 For information related to the ship, its machinery and equipment
or to rule requirements, the Society may issue an Memorandum to
Owner (MO). A MO may supplement information given otherwise, e.g.
in the Appendix to the class certificate or the Society's "Register
of Vessels".
Ch.1 Sec.5 B
307 An MO may be used in the following cases:
| — | exemptions from rule requirements |
| — | accepted deviations from rule requirements |
| — | limitations on the use of the ship or its equipment |
| — | defects or deficiencies of no concern to class |
| — | deleted class notations |
| — | equipment in excess of class requirements disused |
| — | information related to agreed survey arrangements. |
Ch.1 Sec.5 B
308 Outstanding findings may be recorded as a CC or an MO. They
will be given in writing at completion of surveys. Findings may
also be communicated verbally during the course of surveys. Findings
that have been corrected before the survey has been completed will
not be recorded as CC.
Ch.1 Sec.5 B
309 The Society may at any time modify a CC or MO if considered
appropriate. The owner will be notified accordingly.
Ch.1 Sec.5 B
310 CC or MO are recorded in the vessel's class status
from where they will be deleted when no longer valid. The owner
will be notified accordingly.
Ch.1 Sec.5 B
311 The owner will be informed of Retroactive Requirements (RR).
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