Love your post.... but this statement is laughable.
The closes to which English accent, West country, South Coast, Midland, Scouse, Home Counties, London....then you have the Class accents, the list goes on my friend. Then you have to remember onboard a Royal Navy ship of the period its crew were also Jamaican, American, Italian, French, etc etc... its also said that at the time up to 30% of the RN crew were Irish!