...
BUFR template used for ship data is presently TM308009 (B/C10). It should be soon replaced with TM308014. This latter should become operational around November 2016. GTS headers for ship data start with character string 'ISS'. A draft of template TM308014 is available on line. Some minor clarifications occured since this version was published.
Ship observations - Survey on August 6th, 2016
The table here above shows the number of VOS (fixed stations excluded) for which the observations were received by Meteo-France on the 6th of August. Figures are shared by the WMO code which was used: either FM13 SHIP or FM94 BUFR (templates TM308009)This table does not refer to the number of observations which were received. One may consider that 83% of VOS reports are sent onto the GTS in BUFR with template TM308009. Template TM308014 should be adopted in November 2016. Some meteorlogical services are probably waiting its official availability to report VOS observations in BUFR.
Ship BUFR data - Survey on May 6th, 2015
Number of VOS stations having reported ar least one observation on that day
...