Variable length broadcast taking 1..5 slots Need to make much of this an include-struct so that 1-3 are as simple as possible 168 336 504 672 840 F 4 AU AS IN SOTDMA RATDMA ITDMA MOBILE BASE AIS message number. Must be 8 8 Indicated how many times a message has been repeated 0 default do not repeat any more 1 Unique ship identification number (MMSI) 1193046 Reserved for definition by a regional authority. 0 Bits for a binary broadcast message 110000101100000111100010010101001110111001101010011011111111100000110001011100001011111111101111111110011001000000010001110