Radio Signals Vol 3 Part 2, Maritime Safety Information Services, The Americas, Far East and Oceania #np283-2
International Chart Series, Gulf of Bothnia, Grundkallen to Hudiksvall and Kaurissalo to Yttergrund #b2082
Radio Signals Vol 3 Part 1, Maritime Safety Information Services, Europe, Africa and Asia (Exc. The Far East) #np283-1
