HELP FROM THE INDIAN OCEAN

To anyone,
My name ?  Pedro Luaces and I´m twelve years old.I´m on a small island. I´m in  Indian Ocean. My boat ,the 'Vilarmaior Sea',is in  pieces and I haven´t got a radio.I can´t move from the island and I can´t communicate.I haven´t got much time.I´m writing SOS in the sandy.                                                 

                                                                !HELP ME PLEASE!                                           Pedro