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consistently working to enhance the safety of  vessels 
at  sea  by  implementing  measures  through  very 
specific  legal  instruments.  The  IMO’s  principal 
instrument  with  such  focus  is  the  International 
Convention for the Safety of Life at Sea (SOLAS); with 
the  expected  introduction  of  new  technology 
applications that can completely reshape the way the 
shipping  industry  operates,  such  as  Maritime 
Autonomous  Surface  Ships  (MASS),  further 
adaptations  and  changes  in  the  scope  of  SOLAS 
should also be expected. 
Initially, the  SOLAS Convention was  created  as a 
reaction towards the well-known Titanic disaster and 
as  a  response  to  address  passenger  ships'  risks,  but 
today  it  has  increased/expanded  its  scope  widely  to 
become the most important instrument created by the 
IMO with 165 member States party to the Convention 
and a coverage of 99.04% of the gross tonnage of the 
world’s merchant fleet. Nowadays, SOLAS applies to 
all passenger ships that carry of more than twelve (12) 
passengers, as well as to all cargo ships with over five 
hundred  (500)  gross  tonnage  that  are  engaged  on 
international voyages [5]. 
Historically,  the  SOLAS  Convention  has  five 
versions: the first one (was attempted to be) adopted 
in 1914, the second in 1929, the third one in 1948, the 
fourth in 1960, and finally the last major revision took 
place  in  1974.  Over  these  years,  the  IMO  has  most 
often deployed a reactive approach by introducing the 
necessary new  regulations after  the  occurrence  of  an 
important  accident  that  had  attracted  worldwide 
attention.  On  a  positive  note,  lately  there  is  a  shift 
towards  a  preemptive  approach  within  the  IMO,  by 
looking forward and identify relevant needs before a 
major  disaster  occurs.  This  latest  version  of  SOLAS 
also  includes  an  extended  number  of  Codes  that 
provide  the  international  standards  required  for  the 
elements  mentioned  in  that  particular  chapter  of  the 
convention.   
Following a path of continuous improvement, the 
wider regulatory framework under the auspices of the 
IMO  has  resulted  in  a  safer,  cleaner  and  more 
sustainable  shipping  industry  that  is  capable  to 
effectively  support  the  global  economy  needs.  The 
main purpose of this paper is to discuss the aforesaid 
evolution in the IMO’s framework to enhance safety at 
sea,  facilitate  its  better  understanding  and  especially 
highlight the interrelating approach deployed via the 
numerous  Conventions  and  Codes  supporting  this 
framework. Following this brief introductory section, 
the evolution of SOLAS is briefly discussed next. The 
methodology to be used is a qualitative comparison of 
the SOLAS  different Chapters  and the  related Codes 
that are influencing safety at sea. In order to provide a 
structured  summary,  all  SOLAS  interrelations  are 
summarized in a table format. 
2  DISCUSSING THE DEVELOPMENT OF THE 
SOLAS CONVENTION   
The  sinking  of  the  Titanic  in  1912  was  the  starting 
point  of  the  shipping  industry’s  international 
regulatory framework, as it is known today. The first 
international  conference  on  safety  at  sea  met  two 
years later in 1914, and the first version of the SOLAS 
Convention  was  discussed.  After  that  point,  more 
conferences  and  new  versions  of  the  SOLAS 
Convention  were  necessary  to  keep  the  safety 
regulations  of  the  maritime  transport  industry 
updated. The SOLAS  Convention  with  its  successive 
versions has clearly become the most important of all 
international  treaties  concerning  the  safety  of 
merchant vessels,  but an  expedite  mechanism to  put 
in force the regulations was  necessary to make  them 
mandatory  to  the  increasing  international  merchant 
fleet.   
In  the  year  1948,  an  international  conference  in 
Geneva  adopted  a  Convention  formally  establishing 
IMCO  (Inter-Governmental  Maritime  Consultative 
Organization,  which  changed  the  name  to  IMO  in 
1982).  The  IMCO  Convention  entered  into  force  in 
1958, and the new Organization met for the first time 
the  following  year.  Since  its  beginning,  in  1959,  the 
Organization  has  applied  every  effort  to  protect 
human  life  at  sea.  The  Organization  is  also 
empowered  to  deal  with  administrative  and  legal 
matters related to these purposes. IMO’s first task was 
to adopt a new/updated version of  SOLAS, the most 
important of all treaties dealing with maritime safety; 
this was achieved in 1960 [7].   
IMO  has  used  the  concept  of  continuous 
development and improvement, by keeping abreast to 
the  advancements  in  technology  to  ensure  that 
relevant measures that have been incorporated in this 
Convention  mitigate  pre-existing or  newly  identified 
risks. Accordingly, significant revisions took place in 
1929,  1948,  1960  and  1974  that  resulted  into  the 
current International Convention for the Safety of Life 
at  Sea,  1974,  as  amended.  The  Convention  proper 
consist  of  thirteen  (13)  Articles.  Its  Annex  consist  of 
fourteen  (14)  chapters  which  contain  the  applicable 
regulation to all facets of maritime safety. SOLAS 1974 
Convention,  has  also  been  amended  twice  in  1978, 
and 1988  via protocols. After that, the  IMO  with the 
Maritime  Safety  Committee  (MSC)  and  the  work  of 
the  concerned  Subcommittees  continuously  keep  up 
to  date  the  Convention  with  periodic  amendments. 
Since  1981,  SOLAS  has  received  the  impressive 
number  of  a  hundred  and  seventy  six  (176) 
amendments; in addition, the 1978 SOLAS Protocol is 
associated  with  four  (4)  amendments  and  the  1988 
SOLAS Protocol with thirteen (13) amendments [8].   
Amendments  in  the  Convention  can  be  made  via 
two  (2)  different  procedures.  The  first  one  is  after  a 
formal  consideration  within  IMO,  proposed  by 
member states and adopted by a two-thirds majority 
of those contracting Governments present and voting 
in  the  MSC  committee;  the  second  one  is  via  a 
dedicated  conference.  The  SOLAS  1974  version 
includes  a  tacit  acceptance  procedure  which  allows 
that  an  amendment  shall  enter  into  force  on  a 
specified  date  unless,  before  that  date,  objections  to 
the amendment are received from an agreed number 
of Parties [9]. 
Recently  (in  year  2014)  the  MSC  implemented  a 
four-year cycle for the entry into force of amendments 
to the 1974, SOLAS Convention on the notion to take a 
more proactive approach in making regulations after a 
period  of  time  and  revision  of  the  existed  ones,  but 
always  keeping  in  mind  that  exceptional 
circumstances  such  a  serious  casualty  can  always