While a vessel is at sea, continuous radio watch must be maintained on 2182 kHz when operating S.S.B. radio-telephone.
Ngexesha inqanawa iselwandle, ukujongwa kukanomathotholo okuqhubekekayo makungayekwa ku2182 kHz xa kusebenza uS.S.B.nomathotholo mfono-mfono.