About S.O.S
S.O.S is an app to send visual S.O.S using your mobile. It has been developed as simple as possible to help you when you need it.
SOS is the commonly used description for the international Morse code distress signal (· · · — — — · · ·). This distress signal was first adopted by the German government in radio regulations effective April 1, 1905, and became the worldwide standard under the second International Radiotelegraphic Convention, which was signed on November 3, 1906 and became effective on July 1, 1908. SOS remained the maritime radio distress signal until 1999, when it was replaced by the Global Maritime Distress Safety System. SOS is still recognized as a visual distress signal.
by Z####:
If on the water use a vhf radio for Mayday or Pan-Pan distress calls. A signal mirror would out perform this.