AIS vessel details - when you get the decimal place wrong

A lot of vessels have wrong info. Yachts seem to default to 33ft but I have seen many ship-sized ones and ships half a mile long.
 
With the IoW ferries you often see them reversing across the solent between Lymington and Yarmouth having forgot to switch over from stern to bow!
 
When I looked him up on Vessel Finder yesterday length and beam were not stated. So somebody was probably trying to set up the transponder and gave up!
 
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