Generic representation of position on the WGS84 sphereoid. Smaller number of bits. Used by SLS and IMO binary messages. WARNING: the IMO Circ 236 and IALA 1.3 10 p 91 do lat/lon which is OPPOSITE other AIS messages. North South location 91 degrees 60000 4 37.42446 East West location 181 degrees 60000 4 -122.16328 IMO meteorological and hydroglogical data. Specified in SN/Circ.236 Annex 2. Also defined in IALA Guidelines on AIS, Vol 1, Part 1, Ed. 1.3. Guildeline No 1028. All unavailable values are defined to be the highest possible number in the next following 352 AIS message number. Must be 8 8 Indicated how many times a message has been repeated 0 default do not repeat any more 1 MMSI number of transmitter broadcasting the message This might be from a basestation or AtoN. The transmitter might not be at the same location as the Met/Hydro station 1193046 Reserved for definition by a regional authority. 0 Designated Area Code - part 1 of the IAI 1 Functional Identifier - part 2 of the IAI 11 Location of the vessel. Day 0..31 days 3 Hour 0..23 31 hours 21 Min 63 minutes 58 Average wind speed values for the last 10 minutes. FIX: why is 121-126 not valid??? knots 127 23 Wind gust is the max wind speed value reading during the last 10 minutes. FIX: why is 121-126 not valid??? knots 127 35 Wind direction No idea if this is the latest, ave, median, etc. FIX: find out! degrees 511 329 Wind direction for the gust. degrees 511 293 Dry bulb temperature FIX: double check the unavailable value. is it really the max? degrees Celsius 102.3 10 1 -40.1 Relative humidity percent 127 99 Dew Point FIX: should this be a udecimal?? degrees Celsius 51.1 10 1 -19.2 Air pressure hPa 1311 1 800 0 1150 Air pressure trend steady decreasing increasing unavailable 3 2 Horizontal visibility nm 25.5 10 1 11.9 Water level (incl. tide) m 10 1 -8.9 Water level trend steady decreasing increasing unavailable 3 0 Surface current speed knots 25.5 10 1 22.3 Surface current direction degrees 511 321 Level 2 current speed knots 25.5 10 1 12.7 Level 2 current direction degrees 511 122 Measuring level below sea surface for level 2 31 m 29 Level 3 current speed knots 25.5 10 1 19.2 Level 3 current direction degrees 511 93 Measuring level below sea surface for level 3 31 m 28 Significant wave height m 25.5 10 1 22.8 Wave period FIX: How does to fit to the power spectrum? sec 63 2 Wave direction FIX: please define this better degrees 511 187 Swell height m 25.5 10 1 0.2 Swell period FIX: How does to fit to the power spectrum? sec 63 59 Swell direction FIX: please define this better degrees 511 1 Sea state according to the Beaufort scale Taken from http://en.wikipedia.org/wiki/Beaufort_scale Beaufort scale Calm Light air Light breeze Gentle breeze Moderate breeze Fresh breeze Strong breeze Near gale Gale Strong gale Storm Violent storm Hurricane unavailable 15 12 Water temperature FIX: at surface? Any requirements on how measured? FIX: a bit strange to get a negative number out of a udecimal, but possible with an offset degrees Celsius 92.3 10 -10 1 48.8 According to WMO FIX: need a reference to the document describing this! I do not think this is http://badc.nerc.ac.uk/data/surface/code.html WMO scale index FIX: find the WMO list of types unavailable 7 2 Salinity FIX: by what standard? Measured how? 0/00 92.3 10 1 0.9 Yes or no for the presence of ice FIX: what types of ice constitute a yes?? No ice Ice present Reserved Unknown if there is ice present 3 1 Must be zero 0