Circular Letter No.4204/Add.35 (14 December 2020) - Coronavirus (COVID-19) – Coronavirus (COVID-19) – Designation of seafarers as key workers  

Circular Letter No.4204/Add.4/Rev.2 (9 October 2020) - Coronavirus (COVID-19) – ICS Guidance for Ship Operators for the Protection of the Health of Seafarers  

Circular Letter No.4204/Add.14/Rev.1 (5 October 2020) - Coronavirus (COVID-19) – Recommended Framework of Protocols for ensuring safe ship crew changes and travel during the Coronavirus (COVID-19) pandemic  

Circular Letter No.4204/Add.32 (25 September 2020) - Coronavirus (COVID-19) – Coronavirus (COVID-19) – ICAO Harmonized guidance on facilitating passenger flights, including repatriation flights, using public health corridors during the COVID-19 pandemic  

Circular Letter No.4204/Add.29 (4 September 2020) - Coronavirus (COVID-19) – Coronavirus (COVID 19) – Communication from the Secretary-General regarding the crew change crisis 

Circular Letter No.4204/Add.26 (3 August 2020) - Coronavirus (COVID-19) – Coronavirus (COVID-19) – Guidance on the gradual and safe resumption of operations of cruise ships in the European Union in relation to the COVID-19 pandemic  

Circular Letter No.4204/Add.19/Rev.2 (22 July 2020) - Coronavirus (COVID-19) – Coronavirus (COVID-19) – Guidance for flag States regarding surveys and renewals of certificates during the COVID-19 pandemic 

Circular Letter 4204/Add.23 (1 July 2020) - Coronavirus (COVID-19) – Recommendations for port and coastal States on the prompt disembarkation of seafarers for medical care ashore during COVID-19 pandemic 

Press release on the second virtual meeting with PSC regimes in cooperation with the ILO and IACS (18 June 2020) - Coronavirus (COVID-19)– titled, “Port State control regimes cooperate with IMO on crew changes and certificate renewals”  

Circular Letter No.4204/Add.8 (14 April 2020 ) - Coronavirus (COVID-19) – Video meeting with port State control (PSC) regimes  

Circular Letter No.4204/Add.19 (2 June 2020) - Coronavirus (COVID-19) – Guidance for flag States regarding surveys and renewals of certificates during the COVID-19 pandemic 

Circular Letter No.4204/Add.16 (6 May 2020) - Coronavirus (COVID-19) – related guidelines for ensuring a safe shipboard interface between ship and shore-based personnel 

Circular Letter No.4204/Add.15 (6 May 2020) - Coronavirus (COVID-19) – Personal Protective Equipment (PPE) 

Circular Letter No.4204/Add.7 (3 April 2020) - Coronavirus (COVID-19) – Guidance concerning unforeseen delays in the delivery of ships 

Circular Letter No.4204/Add.6 (27 March 2020) - Coronavirus (COVID-19) – Preliminary list of recommendations for Governments and relevant national authorities on the facilitation of maritime trade during the COVID-19 pandemic  

Circular Letter No.4204/Add.5/Rev.1 (2 April 2020) - Coronavirus (COVID-19) – Guidance relating to the certification of seafarers and fishing vessel personnel 

Circular Letter No.4204/Add.4 (5 March 2020) contains ICS - Coronavirus (COVID-19) – Guidance for ship operators for the protection of the health of seafarers  

Circular Letter No.4204/Add.3 (2 March 2020) - Coronavirus (COVID-19) – Operational considerations for managing COVID-19 cases/outbreak on board ships 

Circular Letter No.4204/Add.2 (21 February 2020) contains the - Coronavirus (COVID-19) – Joint Statement IMO-WHO on the Response to the COVID-19 Outbreak and encourages Member States and international organizations to disseminate it as widely as possible. Available in the six official languages of the United Nations system.

Circular Letter No.4204/Add.1 (19 February 2020) provides advice on - Coronavirus (COVID-19) – Implementation and enforcement of relevant IMO instruments 

Circular Letter No.4203.Add.1 (12 February 2020) provides - Coronavirus (COVID-19) – information and guidance on the precautions to be taken to minimize risks to delegates 

Circular Letter No.4204 (31 January 2020) providing information and guidance, based on recommendations developed by the World Health Organization (WHO), on the - Coronavirus (COVID-19) – precautions to be taken to minimize risks to seafarers, passengers and others on board ships  from the coronavirus.