1 The Maritime Safety Committee, at its ninety-sixth session (11 to 20 May 2016), in order
to facilitate global and consistent implementation of the requirements of SOLAS chapter
II-1, approved Unified Interpretations of SOLAS chapter II-1 (MSC.1/Circ.1539), prepared by the Sub-Committee on Ship Design and Construction,
at its third session.
2 The Maritime Safety Committee, at its 101st session (5 to 14 June 2019),
approved amendments to MSC.1/Circ.1539 to include additional text in the
unified interpretations of SOLAS regulation II-1/7-2 on the calculation of the factor
si, as well as new interpretations of regulations II-1/22-1 and II-2/21.4.13 on the safe return to port requirement
for flooding detection systems. The amended text of the unified interpretations is set out
in the annex.
3 Member States are invited to bring the annexed unified interpretations to the attention
of all parties concerned, noting that the unified interpretation of regulations II-1/22-1 and II-2/21.4.13 on the safe return to port requirement for flooding
detection system should only be applied to ships contracted for construction on or after 1
July 2019.
4 This circular supersedes MSC.1/Circ.1539.