IMO Circulars Index

MSC.1, MEPC.1, joint MSC/MEPC, FAL and sub-committee circulars providing guidance on SOLAS, MARPOL, ISM and all IMO instruments.

MSC.1/Circ.1,600+

Guidance, unified interpretations, and recommendations from MSC on SOLAS implementation, fire safety, LSA, navigation equipment, and stability.

›MSC.1/Circ.1432 — Revised guidelines on medical examination of seafarers

›MSC.1/Circ.1503 — Interim guidance on entry into enclosed spaces

MEPC.1/Circ.900+

MARPOL unified interpretations, implementation guidance and technical recommendations on pollution prevention, GHG, ballast water and anti-fouling.

›MEPC.1/Circ.795/Rev.6 — Unified interpretations of MARPOL Annex VI

›MEPC.1/Circ.884 — Guidance on CII operational carbon intensity indicator

MSC-MEPC.1/Circ.200+

Circulars issued jointly by MSC and MEPC on matters affecting both safety and environmental requirements.

›MSC-MEPC.7/Circ.8 — ISM Code guidelines

›MSC-MEPC.4/Circ.2 — Provisional guidelines on PSC inspection procedures

FAL.5/Circ.50+

Guidance on facilitation of international maritime traffic, port formalities, crew documentation and electronic data exchange.

›FAL.5/Circ.45 — Revised guidelines on e-Business

›FAL.5/Circ.39/Rev.2 — Maritime Single Window guidance

PPR/Circ.150+

Sub-committee on PPR circulars on anti-fouling systems, sewage treatment, harmful aquatic organisms, and pollution incident guidance.

›PPR 11/7 — Guidance on BWMS commissioning

›PPR/Circ.5 — Revised GESAMP guidance

SDC/Circ.80+

Sub-committee on SDC guidance on ship stability, subdivision, load lines, tonnage measurement, and damage stability.

›SDC.1/Circ.7 — Interim guidelines on second-generation intact stability

›SDC 9/15 — SOLAS Chapter II-2 fire safety guidance

Recent Circulars

Reference	Subject	Type	Issued
MSC.1/Circ.1687	Interim guidelines for the application of fire safety systems on ships carrying liquefied hydrogen	MSC.1	Jan 2024
MEPC.1/Circ.905	Guidance on the application of the carbon intensity indicator (CII) correction factors and voyage adjustments	MEPC.1	Dec 2023
MSC.1/Circ.1680	Revised guidelines for formal safety assessment (FSA)	MSC.1	Nov 2023
MEPC.1/Circ.900	Guidance on enhanced measures for preventing oil pollution during cargo transfer operations	MEPC.1	Oct 2023
MSC-MEPC.7/Circ.10	Guide on port State control of the ISM Code	MSC-MEPC	Sep 2023
MSC.1/Circ.1668	Unified interpretation to the provisions of SOLAS Chapter XI-2 and the ISPS Code	MSC.1	Jul 2023
MEPC.1/Circ.884/Rev.3	Guidance on operational carbon intensity indicators and their rating mechanisms	MEPC.1	Jun 2023
FAL.5/Circ.54	Guidance on the development and implementation of a Maritime Single Window	FAL	May 2023