a sea-going vessel which may or may not be self-propelled and is fitted with a powerful lighting apparatus. It is permanently anchored, either to mark an outstanding danger to navigation where it is impractical to build a lighthouse, or to indicate the approach of a port and mark a point from which passing vessels can take bearings, ka ujuvmajakas, valgus- ja helisignalisatsiooniseadmega laev, mis on ankurdatud tähistamaks ohtlikku kohta (nt madalat) või näitamaks laevatee käänukohta