CAUTION - MONTAGUE AND GREEN ISLANDS
Mariners are urged to exercise extreme care while transiting the waters adjacent to the 18.2 meter/10 fathom curve around Montague and Green Islands. Numerous uncharted rocks and islets are known to exist in these areas, 75% of the inshore waters surrounding these islands have not been surveyed since the 1964 earthquake, consequently the presence of underwater dangers is conceivable.