Studies
These documents are available the for free and can
be downloaded by clicking the pictures that represent
their cover. They are also published on the website
“Diving and ROV specialists.com”
CCO Ltd
52/2 moo 2 tambon Tarpo 65000 Phitsanulock - THAILAND
Email: info@ccoLtd.co.th Phone: +66 857 277 123
This document discusses the problems posed by the
organization of continuous diving and the limits of
such operations.
1.
Description
2.
Comparison of the methods of decompression
3.
Necessary additional equipment and personnel
4.
Assess whether the continuous diving operation
is economically realistic
5.
Summary of acceptable and not acceptable
solutions
- Study CCO Ltd No 1 “Organize air & nitrox continuous diving
operations”
- Study CCO Ltd No 2 “Organize the maintenance of diving
cylinders”
This document discusses the problems posed by the
maintenance of diving cylinders.
1.
Incident reports linked to bail-outs
2.
Fabrication of diving cylinders
3.
Valve connection to cylinder
4.
Valves
5.
Inspection of diving cylinders
6.
Improve the durability of diving cylinders
7.
Find competent technicians and select suppliers
8.
Manage other standards than ISO
- Study CCO Ltd No 3 “Implement a drug and alcohol abuse policy”
This document discusses the problems posed by drug
and alcohol in a company. Note that it promotes
procedures that are the opposite of a lot of company
policies regarding the methods to be in place to
manage such issues.
1.
Main substances involved in drug abuse
2.
Means of detection and cut-off levels
3.
Organize and implement preventive measures
4.
Testing following incidents and accidents
5.
Reporting
6.
Bibliography
7.
Useful websites
- Study CCO Ltd No 4 “Reinforce the US Navy saturation diving
procedures”
This document demonstrates that a proper
reinforcement of the US Navy procedures is possible
using publications from recognized competent bodies
and that reinforcements made empirically are not
suitable.
1.
Presentation of the US Navy saturation procedures
2.
Elements of the US Navy saturation procedures
reinforced and justifications
3.
Gas, chamber, and bell monitoring
4.
Pressurization
5.
Excursions
6.
Decompression
7.
Emergency procedures
- Study CCO Ltd No 5 “Implement NORMAM-15/DPC saturation
diving procedures”
NORMAM-15/DPC procedures allow safe hyperbaric
exposures up to 350 m and are adopted by the
Brazilian Navy Directorate of Ports and Coasts which
published them in the official document “Maritime
authority norms for subaquatic activities”.
Deep diving operations are successfully performed in
Brazil and other countries using these procedures that
are considered safer than the US Navy procedures.
Normam-15/DPC saturation procedures are the
improvement of those published with the diving tables
Comex MT 92 that are still promoted by the French
Ministry of labour.
This study CCO Ltd takes into account the revision of
these procedures published in 2021 and also indicates
the latest standards that can be implemented to
reinforce this table.
- Study CCO Ltd No 6 “Reflections regarding umbilical lengths when
diving from a DP vessel”.
The rules described by IMCA and ADCI regarding the
safe distance of divers from propellers and other
hazards when diving from a dynamic positioning
vessel have probably saved numerous lives.
However, these guidelines do not indicate elements
that may corrupt the initial calculation, such as the
possibility to adjust the draft of the diving support
vessel, the fact that new ships are equipped with
azimuth thrusters that rotate 360 degrees, and that
currents and a sudden loss of position can impact the
position of the bell.
This document explains methods of calculation that
solve these problems and are easy to implement.
- Study CCO Ltd No 7 “History and evaluation of IMCA D 050 rev. 1 -
Minimum quantities of gas requiered offshore.”
IMCA has recently published an update of the diving
guidance D 050 “Minimum quantities of gas required
offshore” that supersedes the previous version edited
in May 2012.
This is for us the opportunity to remember the purpose
of these guidelines and their evolution since their first
publication by AODC in July 1983. It is also the
occasion to check whether this new revision improves
the previous one and is suitable for commercial diving
operations.
- Study CCO Ltd No 8 “Set a policy for electronic devices in
chambers”
Digital electronic apparatuses have become an
essential part of our universe as we are fully
dependent on them today. An aspect of this
dependence is that most people working in the
offshore industry consider them essential means of
contact and entertainment they do not want to be
deprived of. As a result, these devices are omnipresent
in the accommodations and consequently in the
hyperbaric chambers.
However, the use of electrical and electronic apparatus
in hyperbaric chambers poses several safety problems.
The most discussed is that their batteries are often
involved in undesirable events such as thermal
runaways resulting in sudden fires. For these reasons,
rules must be implemented regarding the transfer and
use of such systems in chambers.
- Study CCO Ltd No 9 “Analysis of the document IOGP 411 rev. 2021
- Recommended practices for diving operations”
IOGP 411 “Recommended diving practices 2021"
replaces the initial diving guidelines published in June
2008 by the Diving operations subcommittee of the
Safety Committee.
According to IOGP, its purpose is to ensure a consistent
approach to training, management, and best practice
worldwide. Thus, we can say that this document is
planned to be used as a reference for the members of
the association, their contractors, and also other
organizations.
However, does this publication really merit being
considered a reference?
It is a question manual writers and divers may ask.
- Study CCO Ltd No 10 “working at height during the mobilization
and the maintenance of diving and ROV systems”
This document has been created in response to reports
from client representatives showing that numerous
mistakes are made regarding work at height during the
mobilization and the maintenance of diving and ROV
systems. Even though these incidents generally have
no consequences, they may trigger accidents resulting
in permanent disabilities or fatalities.
This study, which is mainly based on European
standards, aims not to create new guidelines but to
promote those from competent bodies the author
considers the more relevant.
- Study CCO Ltd No 11 “About pre-dive conditioning and commercial
diving”
“Pre-dive conditioning” refers to experimental studies
made to demonstrate that preparation of the diver
through exercises, oxygen, substances uptake, or other
methods before the immersion has beneficial effects on
decompression.
This document is a quick review of experiments
undertaken and the applicability of the procedures
tested to the commercial diving industry. It also
highlights the lack of means devoted to scientists and
suggests possible actions that commercial diving
companies could implement to support research.
- Study CCO Ltd No 11 “Aout standards”
This study is the PDF version of an article called “About
standards”, published under HTML format on the
website “Diving and ROV Specialists.com”.
It briefly describes the function and origins of standards,
the methods used by unethical pressure groups to
deviate them to their profit and how the various ethical
organizations can organize to fight these pressure
groups.
- Document Diving & ROV Specialists “Description of a saturation
diving system”.
This document describes a saturation diving system in
full and indicates the management system to be in place
to maintain it and be accepted by clients such as IOGP
members.
This description is based on two existing modern
systems fitted with equipment such as a diver
monitoring system, automatic oxygen injection system,
and others.
They are installed in two new sister ships that have been
put in service in 2018.
In addition to the detailed description of the saturation
system, topics such as: Certification process, Failure
Mode Effect Analysis (FMEA), Planned Maintenance
System, and audit s are explained.
This document has been updated in August 2021
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