Rathlin East or Altacarry Head Lighthouse is one of the two Rathlin Island lighthouses. Altacarry is located at 55 18 1 N and 6 10 2 W. Build in 1856, converted to electric in 1981 and automated in 1995. the hight of the tower is 27m, the light is 4 white flashes every 20 seconds day and night, range is 26 nautucal miles . The radar beacon give the Morse "G" on vessel's radar display.