History of FM 13-SHIP, FM 21 SHIP, FM 22 SHIP, FM 23 SHRED, FM 24 SHIP/SHIGY and FM 26 SPESH

Period of each code in effect
CODE	From	To
FM 13 SHIP	1 Jan. 1982	now in effect
FM 21 SHIP	1949	31 Dec. 1981
FM 22 SHIP	1949	31 Dec. 1981
FM 23 SHRED	1949	31 Dec. 1981
FM 24 SHIGY	1 July 1957	31 Dec. 1959
FM 24 SHIP	1 Jan. 1972	31 Dec. 1981
FM 26 SPESH	1949	31 Dec. 1981

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Description of each change with resolution and recommendation

Date in effect	Decription of change	Resolution	Recommendation
5 Nov 2003	FM 13-XII Ext. SHIP is made (amendments to FM 13-XI Ext. SHIP) - Amendment to the regulation on reporting precipitation	Res. 8 EC-LV (May 2003)	Rec. 4 CBS-Ext. (02) (Dec. 2002)
3 May 2000	FM 13-XI Ext. SHIP is made (amendments to FM 13-XI SHIP) - Amendment to the regulation on reporting past-weather	Res. 8 EC-LI (May 1999)	Rec. 6 CBS-Ext. (98) (Sept. 1998)
5 Nov. 1997	FM 13-XI SHIP is made (amendments to FM 13-X SHIP) - A new regulation to avoid possible confusion in the radiation groups and group 5 of section 3	Res. 4 EC-XLIX (June 1997)	Rec. 7 CBS-XI (Oct. 1996)
2 Nov. 1994	FM 13-X SHIP is modified - Add wet-bulb temp. - Systematically report present, past weather temp., clouds and waves - Indicate type of SST measurement	Res. 4 EC-XLV (June 1993)	Rec. 9 CBS-X (Sept. 1992)
3 Nov. 1993	FM 13-X SHIP is made (amendments to FM 13-IX Ext. SHIP) - Procedure to reporting net short wave and direct solar radiation	Res. 4 EC-XLV (June 1993)	Rec. 8 CBS-X (Sept. 1992)
1 Nov. 1991	FM 13-IX Ext. SHIP is made (modification to FM 13-IX SHIP) - Pressure tendency algorithm - Total amount of precipitation - Actual time of observation	Res. 8 EC-XLIII (May 1991)	Rec. 13 CBS Ext. (90) (Sept. 1990)
1 Nov. 1989	FM 13-IX SHIP is made (modification to FM 13-VIII Ext. SHIP) - Snow-depth data - Precipitation data - Daily amount of evaporation (evapotranspiration), net-radiation and duration of sunshine data	Res. 1 EC-XL (June 1988)	Rec. 12 CBS-IX (Jan. 1988)
1 Nov. 1987	FM 13-VIII Ext. SHIP is made (amendments to FM 13-VII SHIP) - Broaden use of N = / - Present weather from automatic ship stations - Identifiers of ocean platform such as drilling, oil and gas rigs - Wave height in reports from automatic ship stations	Res. 4 EC-XXXVIII (June 1986)	Rec. 5, 10 CBS Ext. (85) (Oct. 1985)
1 Jan. 1984	FM 13-VII SHIP is modified - Improvements in the regulations, notes and specifications	Res. 4 EC-XXXV (May 1983)	Rec. 6 CBS-VIII (Jan. 1983)
1 Jan. 1982	FM 13-VII SHIP is introduced (deletion of FM 21-V SHIP, FM 22-V SHIP, FM 23-V SHRED and FM 24-V SHIP) - Common code for reporting surface observations from different types of surface station	Res. 5 EC-XXXI (May 1979)	Rec. 14 CBS-VII (Nov. 1978) Annex to Rec.14
1 Jan. 1979	FM 21-V SHIP, FM 22-V SHIP and FM 23-V SHRED are amended - Revision of ice group	Res. 3 EC-XXIX (May 1977)	Rec. 9 CBS Ext. (76) (Nov. 1976) Axxen to Rec.9
1 Jan. 1978	FM 21-V SHIP, FM 22-V SHIP, FM 23-V SHRED and FM 24-V SHIP are amended - Revision of the notes on the codes Res. 3 EC-XXIX (May 1977)		Rec. 12 CBS Ext. (76) (Nov. 1976)
1 Jan. 1972	FM 21.E, FM 22.E and FM 23.E are made (amendments to FM21.D, FM22.D and FM 23.D) - Introduction of MiMiMjMj	Res. 15 EC-XXII (Oct, 1970)	Rec. 8 CSM-V (June 1970)
	Section 1 of FM 24.E is introduced - Introduction of Section 1 of FM 24.E before the general introduction in 1975 - General introduction of FM 24.E was recommend as from 1 Jan. 1975 in Rec. 22 CSM-V and decided in Res. 14 EC-XXII. However preference for other codes over FM 24.E was recommended in Rec. 7 CSM-VI and decided in Res. 3 EC-XXVI.	Res. 15 EC-XXII (Oct. 1970) Res. 14 EC-XXII (Oct. 1970) Res. 3 EC-XXVI (June 1974)	Rec. 23 CSM-V (June 1970) ANNEX XX (Annex to Rec.22) Rec. 22 CSM-V (June 1970) ANNEX XX (Annex to Rec.22) Rec. 7 CSM-VI (June 1974)
1 Jan. 1968	FM 21.D, FM 22.D and FM 23.D are made (amendments to FM21.C, FM22.C and FM 23.C) - Sea surface temperature, wind wave and swell wave - Ship’s average speed: vs - Position: 99LaLaLa QcLoLoLoLo are introduced	Res. 13 EC-XVIII (May 1966)	Rec. 5, 9, 13, 24 and 25 CSM-IV (Mar. 1966)
1 Jan. 1964	FM 21.C, FM 22.C and FM 23.C are made (amendments to FM21.B, FM22.B and FM 23.B) - Coding visibility at ocean weather station - Code for reporting sea ice: (2IsEsEsRs) - Amend the coding procedure of precipitation: 7RRtRtR	Res. 34 EC-XIV (May 1962)	Rec. 26-28 CSM-III (Mar. 1962)
1 Jan. 1960	FM 23.B SHRED is made (replacement of FM 23.A) Extended use of FM 24 SHIGY and change over to FM23.B - Reduced type a ship report - FM 24 be continued for a period of one year after the end of IGY	Res. 22 EC-X (April 1958)	Rec. 1 CSM-II (Jan. 1958)
	FM 26.B SPESH is made (replacement of FM 26.A) - Reduced type a ship report		Rec. 2 CSM-II (Jan. 1958)
	amendments to notes and specifications - A minor change in the specification for PPP - Notes on code table for Pw		Rec.13 and 16 CSM-II (Jan. 1958)
1 Jan. 1958	modifications to technical regulations - Use of 7RRjj (precipitation) in code form FM 21.A - Reporting of distinct sea and swell - Descriptive terms for wave height - Descriptive term for ice	Res. 33 and 35 EC-IX (May 1957) Annex to Res.35	Rec. 7, 9, 10 and 11 CMM-II (Oct. 1956)
1 July 1957	FM 24 SHIGY is introduced - A new code form for the International Geophysical Year (July 1957 ? Dec. 1958)	Res. 36 EC-IX (May 1957)	Rec. 14 CMM-II (Oct. 1956)
1 Jan. 1955	FM 21.A, FM 22.A and FM 23.A are made (amendments to FM21, FM22 and FM 23) - Reports from light vessels - Specifications for various codes - Heights of waves - Introduction of Dsvsxxx	Res. 21 EC-IV (May 1953)	Rec. 8, 11, 15, 16 and 18 CSM-I (April 1953)
--	inclusion of ships’ call signs	Res. 24 EC-IV (May 1953)	Rec. 29 CSM-I (April 1953)
1949	SHIP is introduced	Res. 161 (CD, Washington 1947)	Rec. XVI (CSWI Toronto 1947)