Something to keep us amused while on our Travels!T

Takethedogalong

We are quite fond of trivia and often make up quizzes to amuse ourselves while away. Latest quest is to spot all the different codes on fishing and pleasure crafts that are registered to the various ports/harbours around the British Isles. Here are a few
to have a go at guessing, some easy, some rather more obscure:

(no googling allowed!)

GR

FY

RR

RX

LR

S

WY

SSS

AA

IE

TT

Can anyone guess them all? Some quite obvious ones, but some are very obscure! Answers in a few days.