International Space Station:
NA1SS
Sea Shepherd Conservation Society currently has 3 boats:

1. M/Y Steve Irwin - GUMF
2. R/V Farley Mowat - <callsign unknown>
3. Yoshka - <callsign unknown>

Other Sea Shepherd Conservation Society callsigns:

1. Sea Shepherd - MEFZ6

More info to come later.