What's the deal with the call signs of tankers? A couple of years back it was decided to rename all tankers to BWC(capacity)... Then followed a bit of confusion, and it was my understanding that the name had been changed back...
However it seems different groups are doing things differently - Heysen call their tanker 'Heysen BWC 12' but Mount lofty call their tanker 'Mount Lofty Tanker'.
Is there a directive somewhere that states what is correct?