About 100 personnel serve at Karatoa, which is categorized as Large Offshore Patrol Vessel in the Bangladesh Navy.
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The Island Class offshore patrol vessels, built by Hall, Russell & Company in Aberdeen, were modelled on the ocean-going trawlers FPV Jura (1973) and FPV Westra (1974).
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BNS Karatoa is an Island Class Offshore patrol vessel of the Bangladesh Navy, built as the Royal Navy offshore patrol vessel, HMS Alderney (P278).