Seelonce Mayday :-
It is transmitted by controlling (station)
The station controlling the distress traffic may impose silence on any interfering station by using the terms.
Seelonce Distress :-
Stations other than the controlling station may impose silence on an interfering stations by using this term.
When complete silence is no longer necessary on the frequency which is being used. It indicates distress in force, but restricted working may be resumed.
Seelonce feenee :-
It means controlling station is announcing that distress traffic has ceased on a frequency which has been used for distress and is no longer necessary and normal working may be resumed.