History of IMMPC/IMMT
Description of each change with resolution and recommendation
Date in effect Decription of change Resolution Recommendation 1 Jan 2007 IMMT-3 is introduced (modifications to IMMT-2 format)
- To incorporate QC information required for the VOSClim ProjectRes. 6 EC- LVIII (June 2006) Rec. 9 JCOMM-II (Sep. 2005) 1 Jan 2003 IMMT-2 is introduced (modifications to IMMT-1 format)
- To incorporate new data elements required for the VOSClim ProjectRes. 7 EC- LIV (June 2002) Rec. 8 JCOMM-I (June 2001) 1 Jan 1998 Introduction of ISO Alpha-2 country code into IMMT format
- ISO Alpha-2 country code be used as the country codes in the IMMT formatRes. 8 EC-XLIX (June 1997) Rec. 8 CMM-XII (Mar. 1997) 2 Nov. 1994 IMMT-1 is introduced (modifications to IMMT format)
- IMMT-1 is introducedRes. 10 EC-XLV (June 1993) Rec. 13 CMM-XI (April 1993)
Annex to Rec.131 Mar. 1985 Modification to IMMPC and IMMT format
- Inclusion of weather data indicator ix to IMMPC and IMMTRes. 8 EC-XXXVII (June 1985) Rec. 5 CMM-IX (Oct. 1984) 1 Jan. 1982 Revision of the IMMPC and introduction of the IMMT format
- Revision of IMMPC in accordance with FM 13-VII SHIP
- Introduction of IMMTRes. 9 EC-XXXIV (June 1982) Rec. 8 CMM-VIII (Sept. 1981) 1 Jan. 1966 Amendments to IMMPC
- Visibility, height of cloud, etc. are modifiedRes. 14 EC-XVII (May 1965) Rec. 28 CMM-IV (Nov. 1964) 1 Jan. 1962 Amendments to technical regulations, etc. Res. 18 and 20 EC-XIII (May 1961)
Annex to Res.20Rec.23 CMM-III (Aug. 1960)
Annex to Rec.23-- - Re-allocation of numbers indicating the country of origin
- Date of changing IMMPCRes. 18 EC-XIII (May 1961) Rec. 24 and 25 CMM-III (Aug. 1960) -- Amendments to technical regulation: use of international punch card
- International maritime punch card should be usedRes. 33 EC-IX (May 1957) Rec. 30 CMM-II (Oct. 1956)
Attachment to annex to Rec.301951? Adoption of international code form for punching cards from ship observations Res. 23 (CD 1951)