Maybe a prawner?

[TQA]

I spotted this old wooden boat in Grenada. She flies the US flag and has been the cruising home for Matt and Sue for more than 20 years.

They bought her knowing nothing of her history, but have been told she might well be a Morecambe bay prawner. She was originally built without an engine.

I thought the stern was the giveaway but are there any other clues?

 

[Lakesailor]

Have a browse around here http://www.nobbyownersassociation.co.uk/

I don't know if they built them as yawls.

 

[Bajansailor]

She looks similar in some ways to Don Street's famous yawl 'Iolaire' - maybe they had the same designer?
http://www.street-iolaire.com/disc.htm