Symbol 6185-2 from IEC 60417 - Title/Meaning: Own ship, simplified Function/description: To indicate the position of an own ship as ""Simplified Symbol"".[]The outer circle shall be 6 mm in diameter. The inner circle shall be 3 mm in diameter.[]The circles shall be drawn using a thick solid line style. Recommended colour: white.
Additional information: 
See also 6185-1 and 6185-3
""The user may alternatively select to present own ship as a Simplified Symbol comprised of two concentric circles centred at CCRP. The outer circle shall be 6 millimetres in diameter. The inner circle shall be 3 millimetres in diameter.,The circles shall be drawn using a thick solid line style. Recommended colour: white.""
Own work using: iso.org/obp/graphics/grs/fd2b95c2-23e3-496c-bd59-3b9c9747adf7 200.png
Vectorization:  Mrmw